FIRST CAPITAL GROWTH FUND-XIV
8-K, 1998-08-21
REAL ESTATE
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<PAGE>
 

                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION

                          Washington, D.C. 20549-1004


                                   FORM 8-K

                                CURRENT REPORT


Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934


Date of Report (Date of earliest event reported)           August 6, 1998
                                                 -------------------------------


      FIRST CAPITAL GROWTH FUND - XIV, A REAL ESTATE LIMITED PARTNERSHIP
- --------------------------------------------------------------------------------
            (Exact name of registrant as specified in its charter)


Illinois                            0-17611                       36-3552804
- --------------------------------------------------------------------------------
(State or other jurisdiction      (Commission                   (IRS Employer
      of incorporation)           File Number)               Identification No.)


Two North Riverside Plaza, Suite 1000, Chicago, Illinois          60606-2607
- --------------------------------------------------------------------------------
        (Address of principal executive offices)                  (Zip Code) 


Registrant's telephone number, including area code         (312) 207-0020
                                                   -----------------------------


- --------------------------------------------------------------------------------
        (Former name or former address, if changed since last report.)


                      This document consists of 93 pages.

                    The Exhibit Index is located on page 3.
<PAGE>
 

ITEM 2. DISPOSITION OF ASSETS
- ------- ---------------------
 
1800 Sherman Associates, a joint venture in which First Capital Growth Fund -
Series XIV, a Real Estate Limited Partnership (the "Registrant") owns a 50%
interest, sold its interest in the real property commonly known as 1800 Sherman
Office Building ("1800 Sherman"), located in Evanston, Illinois to Prentiss
Properties Acquisition Partners, L.P., a Delaware Corporation.
 
The closing of this transaction occurred on August 6, 1998. 1800 Sherman was
sold for cash to an unrelated party pursuant to arm's-length negotiations. The
gross sale price was $15,050,000. The Registrant's share of Sale Proceeds was
approximately $7,275,000, which was net of actual and estimated closing
expenses. For the quarter ending September 30, 1998, the Registrant will record
a gain for financial reporting purposes of approximately $1,600,000 from this
transaction. In accordance with the contract to sell the property, the joint
venture placed $500,000 of the proceeds from this transaction into an interest
bearing escrow account for a nine-month period. The funds placed into escrow are
intended to cover any potential claims asserted by the purchaser arising from
the representations and warranties made by the joint venture. The Partnership
intends to distribute $6,896,100 or $47.50 per Unit on November 30, 1998 to
Limited Partners of record as of August 6, 1998. Following this distribution,
the General Partner will work towards wrapping up the Partnership's affairs.
Upon completion, together with the release of the remaining funds held in
escrow, the Partnership intends to make a liquidating distribution, less funds
needed to cover any remaining or potential liabilities, during 1999.

                                    Page 2
<PAGE>
 

ITEM 7.   PRO FORMA FINANCIAL INFORMATION AND EXHIBITS
- -------   --------------------------------------------

     (page 5) Pro Forma Financial Information
 
     Exhibits
 
     2.1  (page 10) Closing Statement, dated August 6, 1998, between the
          Registrant and Prentiss Properties Acquisition Partners, L.P., a
          Delaware Corporation ("Purchaser").
 
     2.2  (page 18) Contract for Purchase of Real Property, executed in July
          1998, between the Registrant and Purchaser.
           
 
No information is required under Items 1, 3, 4, 5, 6 and 8; therefore, those
Items have been omitted.
 
 
                                    Page 3
<PAGE>
 

                                  SIGNATURES
 
Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.
 
                                      FIRST CAPITAL GROWTH FUND - SERIES XIV,
                                      A REAL ESTATE LIMITED PARTNERSHIP
                                 
                                      By: FIRST CAPITAL FINANCIAL CORPORATION
                                          As General Partner
                                 
                                 
August 21, 1998                       By: /s/ NORMAN M. FIELD
- ---------------                           --------------------------------------
    (Date)                                    NORMAN M. FIELD
                                          Vice President - Finance and Treasurer


                                    Page 4 
<PAGE>
 

      FIRST CAPITAL GROWTH FUND - XIV, A REAL ESTATE LIMITED PARTNERSHIP
 
 
The accompanying unaudited Pro Forma Balance Sheet has been presented as if the
sale of 1800 Sherman had occurred on June 30, 1998. The accompanying unaudited
Pro Forma Statement of Income and Expenses for the six months ended June 30,
1998 has been presented as if the sale of 1800 Sherman had occurred on December
31, 1997. The accompanying unaudited Pro Forma Statement of Income and Expenses
for the year ended December 31, 1997 has been presented as if the sale of 1800
Sherman had occurred on December 31, 1996. In the opinion of the General
Partner, all adjustments necessary to reflect the financial condition and
results of operations of the Partnership exclusive of 1800 Sherman have been
made. The unaudited pro forma financial statements are not necessarily
indicative of what the actual financial position and results of operations would
have been had such transactions actually occurred as of June 30, 1998 and
December 31, 1997 and 1996, nor do they purport to represent the results of
operations of the Registrant for future periods.

                                    Page 5
<PAGE>


      FIRST CAPITAL GROWTH FUND - XIV, A REAL ESTATE LIMITED PARTNERSHIP

                            PRO FORMA BALANCE SHEET
                                  (Unaudited)

                     (All dollars rounded to nearest 00s)
<TABLE>
<CAPTION>
                    ASSETS

                                                                                   Pro Forma
                                                   June 30,        Pro Forma        Balance
                                                     1998         Adjustments        Sheet
                                                 -----------      -----------      ----------
<S>                                              <C>              <C>              <C>
Investment in commercial rental property:
  Land                                           $ 1,319,000      $(1,319,000)     $
  Buildings and improvements                       5,967,400       (5,967,400)
                                                 -----------      -----------      ----------

                                                   7,286,400       (7,286,400)
  Accumulated depreciation and amortization       (1,622,200)       1,622,200
                                                 -----------      -----------      ----------

  Total investment properties, net of
    accumulated depreciation and amortization      5,664,200       (5,664,200)

Cash and cash equivalents                          2,091,400        6,460,200       8,551,600
Investment in debt securities                        496,700                          496,700
Escrow deposits                                                       250,000         250,000
Rents receivable                                      35,000          (35,000)
Due from Affiliates, net                               5,700                            5,700
Other assets                                          10,900           (3,600)          7,300
                                                 -----------      -----------      ----------

                                                 $ 8,303,900      $ 1,007,400      $9,311,300
                                                 ===========      ===========      ==========

      LIABILITIES AND PARTNERS' CAPITAL

Liabilities:
  Accrued real estate taxes                      $   541,200      $  (541,200)     $
  Distributions payable                              129,000        6,896,100       7,025,100
  Accounts payable and accrued expenses               51,600          (16,700)         34,900
  Security deposits                                   39,700          (39,700)
                                                 -----------      -----------      ----------

                                                     761,500        6,298,500       7,060,000
                                                 -----------      -----------      ----------

Partners' capital:
  General Partner                                    147,300           16,000         163,300
  Limited Partners (145,182 Units outstanding)     7,395,100       (5,307,100)      2,088,000
                                                 -----------      -----------      ----------

                                                   7,542,400       (5,291,100)      2,251,300
                                                 -----------      -----------      ----------

                                                 $ 8,303,900      $ 1,007,400      $9,311,300
                                                 ===========      ===========      ==========
</TABLE>

              The accompanying notes are an integral part of the 
                        pro forma financial statements.

                                    Page 6
<PAGE>

      FIRST CAPITAL GROWTH FUND - XIV, A REAL ESTATE LIMITED PARTNERSHIP

                  PRO FORMA STATEMENT OF INCOME AND EXPENSES
                                  (Unaudited)

                      (All dollars rounded to nearest 00s
                           except per Unit amounts)

<TABLE>
<CAPTION>
                                                     Six Months Ended June 30, 1998
                                           -------------------------------------------------
                                                                                 Pro Forma
                                             Statement of                      Statement of
                                             Income and         Pro Forma       Income and
                                              Expenses          Adjustments      Expenses
                                           ---------------    ------------     -------------
<S>                                        <C>                <C>              <C>
Income:
  Rental                                   $       809,500    $  (809,500)     $
  Interest                                          62,900                            62,900
                                           ---------------    ------------     -------------
                                                   872,400       (809,500)            62,900
                                           ---------------    ------------     -------------
Expenses:
  Depreciation and amortization                    131,800       (131,800)
  Property operating:
    Affiliates                                      47,300        (47,300)
    Nonaffiliates                                   73,900        (73,900)
  Real estate taxes                                265,600       (265,600)
  Insurance - Affiliate                              3,500         (3,500)
  Repairs and maintenance                           83,900        (83,900)
  General and administrative:
    Affiliates                                       5,800                             5,800
    Nonaffiliates                                   33,100                            33,100
                                           ---------------    ------------     -------------
                                                   644,900       (606,000)            38,900
                                           ---------------    ------------     -------------
Net income                                 $       227,500    $  (203,500)     $      24,000
                                           ===============    ============     =============
Net income allocated to General Partner    $        22,800    $   (20,400)     $       2,400
                                           ===============    ============     =============
Net income allocated to Limited Partners   $       204,700    $  (183,100)     $      21,600
                                           ===============    ============     =============
Net income allocated to Limited
  Partners per Unit (145,182 Units
  outstanding)                             $          1.41    $     (1.26)     $        0.15
                                           ===============    ============     =============
</TABLE>



    The accompanying notes are an integral part of the pro forma financial
                                  statements.

                                    Page 7
<PAGE>
 
      FIRST CAPITAL GROWTH FUND - XIV, A REAL ESTATE LIMITED PARTNERSHIP

                  PRO FORMA STATEMENT OF INCOME AND EXPENSES

                      (All dollars rounded to nearest 00s
                           except per Unit amounts)


<TABLE> 
<CAPTION> 
                                                   Year Ended December 31, 1997
                                          ---------------------------------------------- 
                                                                             Pro Forma
                                                                             Statement of
                                          Statement of       Pro Forma       Income and
                                          Income and        Adjustments       Expenses
                                           Expenses         (Unaudited)      (Unaudited)
                                          -----------       -----------      ----------- 
<S>                                      <C>               <C>              <C> 
Income:                                                                 
  Rental                                   $1,577,900       $(1,577,900)     $
  Interest                                    135,300                         135,300
                                           ----------       -----------      --------
                                                                              
                                            1,713,200        (1,577,900)      135,300   
                                           ----------       -----------      --------
Expenses:                                                                     
  Depreciation and amortization               252,400          (252,400)      
  Property operating:                                                         
    Affiliates                                100,900          (100,900)      
    Nonaffiliates                             139,000          (139,000)      
  Real estate taxes                           525,500          (525,500)      
  Insurance - Affiliate                        11,400           (11,400)      
  Repairs and maintenance                     147,200          (147,200)      
  General and administrative:                                                 
    Affiliates                                 13,600                          13,600
    Nonaffiliates                              51,500                          51,500
                                           ----------       -----------      --------

                                            1,241,500        (1,176,400)       65,100
                                           ----------       -----------      --------

Net income                                 $  471,700       $  (401,500)     $ 70,200
                                           ==========       ===========      ========

Net income allocated to General Partner    $   47,200       $   (40,200)     $  7,000
                                           ==========       ===========      ========
                                                                              
Net income allocated to Limited Partners   $  424,500       $  (361,300)     $ 63,200
                                           ==========       ===========      ========
Net income allocated to Limited                                               
  Partners per Unit (145,182 Units                                            
  outstanding)                             $     2.92       $     (2.49)     $   0.43
                                           ==========       ===========      ========
</TABLE>


         The accompanying notes are an integral part of the pro forma 
                             financial statements.



                                    Page 8
<PAGE>
 
  FIRST CAPITAL GROWTH FUND -- SERIES XIV, A REAL ESTATE LIMITED PARTNERSHIP

                     Notes to Pro Forma Balance Sheet and 
                  Pro Forma Statements of Income and Expenses

1)  For the purpose of the Pro Forma Balance Sheet:

    a) the accounts for land, buildings and improvements, accumulated 
    depreciation and amortization, rents receivable, escrow deposits, other
    assets, accounts payable and accrued expenses, security deposits and other
    liabilities have been adjusted as of June 30, 1998 to reflect the sale of
    the Registrant's interest in 1800 Sherman.

    b) Cash and cash equivalents and escrow deposits have been adjusted to
    include the Sale Proceeds of 1800 Sherman received and placed in escrow by
    the Registrant.

    c) Distributions payable have been adjusted to reflect the declaration of 
    a special distribution of 1800 Sherman Sale Proceeds. 

2)  For the purpose of the Pro Forma Statement of Income and Expenses for the
    six months ended June 30, 1998 and for the year ended December 31, 1997, the
    adjustments to the income and expenses reflect the elimination of the
    Registrant's interest in the operations of 1800 Sherman.




               


                                    Page 9


<PAGE>

- --------------------------------------------------------------------------------
                         CLOSING STATEMENT INFORMATION
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
<S>                   <C>
Property Name:        1800 SHERMAN OFFICE BUILDING

Seller:               1800 SHERMAN ASSOCIATES
                      an Illinois general partnership

Purchaser:            PRENTISS PROPERTIES ACQUISITION PARTNERS, L.P.
                      a Delaware limited partnership

Proration Date:       8/5/98

Proration as of:      11:59 PM, WEDNESDAY, AUGUST 5, 1998

Closing Date:         8/5/98

Closing as of:        WEDNESDAY, AUGUST 5, 1998

Tax Begin Date:       8/1/98

Tax End Date:         8/5/98

Month Begin Date      8/1/98

Month End Date        8/31/98
</TABLE>

<PAGE>

                               CLOSING STATEMENT
                         1800 SHERMAN OFFICE BUILDING

- --------------------------------------------------------------------------------

SELLER:                   1800 SHERMAN ASSOCIATES
                          an Illinois general partnership

PURCHASER:                PRENTISS PROPERTIES ACQUISITION PARTNERS, L.P.
                          a Delaware limited partnership

PRORATION DATE:           11:59 PM, WEDNESDAY, AUGUST 5, 1998

CLOSING (FUNDING) DATE:   WEDNESDAY, AUGUST 5, 1998

<TABLE> 
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------
                                                                                     CREDIT              CREDIT   
                                                                                  PURCHASER              SELLER   
                                                                           ----------------    ----------------   
<S>                                                                        <C>                 <C> 
PURCHASE PRICE                                                                                    14,800,000.00   
                                                                                                                  
EARNEST MONEY (held by the Chicago Title Insurance Company)                      250,000.00                       
                                                                                                                  
INTEREST ON EARNEST MONEY                                                               POC                       
                                                                                                                  
CREDIT FOR 1997 SECOND INSTALLMENT OF PROPERTY TAXES                             550,000.00                       
                                                                                                                  
PRO-RATE AUGUST, 1998 LEASE CHARGES                                              148,573.23                       
          [See Schedule D]                                                                                        
                                                                                                                  
TENANT PREPAID RENTS                                                                  89.60                       
          [See Schedule B]                                                                                        
                                                                                                                  
TENANT IMPROVEMENT CREDIT FOR ARTHUR WINTER                                                            2,800.00    

PRO-RATE SERVICE CONTRACTS                                                        15,618.03
          [See Schedule C]

SECURITY DEPOSITS                                                                 67,577.59
          [See Schedule D]

PARKING TAX CREDIT 7/21/98-8/31/98                                                   884.00
          [See Schedule E]

UNION VACATION CREDIT                                                              2,559.36

EVANSTON WATER & SEWER DEPARTMENT COMPLIANCE CREDIT (NOTE 4)                         972.00
                                                                           ----------------    ----------------

          SUBTOTALS                                                            1,036,273.81       14,802,800.00

CASH AMOUNT DUE TO SELLER                                                     13,766,526.19
                                                                           ----------------    ----------------

          TOTAL CREDITS                                                       14,802,800.00       14,802,800.00
                                                                           ================     ===============
</TABLE> 

NOTES:

[1]  Utility payments shall be directed to the parties for their respective
     periods of ownership based upon meter readings ordered the day before the
     Closing Date, or if meter readings are made after closing, utility payments
     will be reprorated after closing.

[2]  Interest earned on the Earnest Money Deposit shall be returned directly to
     Purchaser.

[3]  The owner of the building is obligated to pay a sales tax to the City of
     Evanston based on parking tickets sold. The seller is crediting the
     purchaser with parking tickets sold and used during the sellers period of
     ownership.

[4]  Seller is crediting Purchaser to pay remaining costs for Cahill Plumbing to
     repair water control devices to comply with City of Evanston Water & Sewer
     Department requirements and to address issues raised in August 1, 1998
     letter from Water & Sewer Department to Equity Office Properties. This
     amount also covers payment of October 1997 amounts incurred by Seller and
     visit to property on August 6, 1998.

APPROVED:  SELLER                             APPROVED:  PURCHASER

1800 SHERMAN ASSOCIATES                       PRENTISS PROPERTIES ACQUISITION 
an Illinois general partnership               PARTNERS, L.P.
                                              a Delaware limited partnership

By: First Capital Income and Growth Fund      By: Prentiss Properties I, Inc.,
Series-XII, an Illinois limited               a Delaware corporation, its
partnership, a general partner                general partner             
                                                                         
By: First Capital Financial Corporation,
a Florida corporation, its general partner

By:                                           By: 
    ----------------------------                  ------------------------------

By: First Capital Fund Series-XIV,
a Real Estate Limited Partnership, 
an Illinois limited partnership, 
a general partner

By: First Capital Fund XIV, Inc.
an Illinois corporation, its general partner

By:
   ----------------------------

<PAGE>


- --------------------------------------------------------------------------------

                         1800 SHERMAN OFFICE BUILDING

                          SOURCES AND USES STATEMENT

- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                         PURCHASER'S SOURCES AND USES:
<S>                                             <C>                <C>

BALANCE OF CASH TO BE FUNDED BY PURCHASER                          13,766,526.19
                                                                   -------------
ADDITIONAL CASH OUTLAYS BY PURCHASER:

  CHICAGO TITLE INSURANCE COMPANY
    Title Insurance Policy Endorsements (100%)     975.00
    Escrow Fees (50%)                              750.00
    Deed Recording (100%)                           25.00
    Holdback Escrow Fee (100%)                     500.00

  PAYMENT OF RUDNICK & WOLFE                    34,300.00

  PAYMENT OF PRIME APPRAISAL GROUP, LLC.         3,000.00
                                                ---------

  PURCHASER'S CLOSING COSTS                                            39,550.00
                                                                   -------------

TOTAL CASH OUTLAY BY PURCHASER                                     13,806,076.19
                                                                   =============

- --------------------------------------------------------------------------------

                          SELLER'S SOURCES AND USES:


EARNEST MONEY                                                         250,000.00
CASH AMOUNT DUE TO SELLER                                          13,766,526.19
                                                                   -------------
TOTAL SELLER'S SOURCES                                             14,016,526.19
                                                                   -------------

ITEMS PAYABLE FROM SELLER'S PROCEEDS AT CLOSING:

  CHICAGO TITLE INSURANCE COMPANY
    Title Insurance Premium (100%)               5,185.00
    Transfer Taxes (100%)                       22,200.00
    Land Trust Fees (100%)                         185.00
    Escrow Fees (50%)                              750.00
                                                ---------
                                                                       28,320.00

COMMISSION FOR CB COMMERCIAL                                          333,000.00

HOLDBACK ESCROW TO BE HELD BY CHICAGO TITLE                           500,000.00
                                                                   -------------

TOTAL CASH OUTLAY BY SELLER                                           861,320.00


BALANCE TO SELLER                                                  13,155,206.19
                                                                   =============
</TABLE>
<PAGE>


                                  SCHEDULE A

- --------------------------------------------------------------------------------

1800 SHERMAN OFFICE BUILDING
PRO-RATE 1997 PROPERTY TAXES
PRORATION MADE AS OF:             11:59 PM, WEDNESDAY, AUGUST 5, 1998

- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
<S>                                                                  <C>
ACTUAL FIRST INSTALLMENT FOR 1997 REAL ESTATE TAXES (PAYABLE 1998)
- ------------------------------------------------------------------
#11-18-119-022-0000                                                  510,034.60
                                                                     ----------

ESTIMATED SECOND INSTALLMENT OF 1997 TAXES (PAYABLE 1998)            550,000.00

PURCHASER'S  PRORATA SHARE OF 1997 TAXES               0/365              0.000%
                                                                     ----------

PURCHASER'S SHARE OF 1997 TAXES                                               -
SELLER'S SHARE OF 1997 TAXES                                         550,000.00

CREDIT DUE TO PURCHASER (SELLER):                                    550,000.00
                                                                     ==========
</TABLE>
<PAGE>


                                  SCHEDULE B

- --------------------------------------------------------------------------------

1800 SHERMAN OFFICE BUILDING
TENANT PREPAID RENTS
PRORATION MADE AS OF:             11:59 PM, WEDNESDAY, AUGUST 5, 1998

- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                         AMOUNT
SUITE #         TENANT NAME                                              PREPAID
- --------------------------------------------------------------------------------
<S>             <C>                                                      <C>
        Prepaid Rent:

    110         FEDERAL EXPRESS                                            89.60
                                                                         -------

                                        CREDIT TO PURCHASER                89.60
                                                                         =======
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
                                                            SCHEDULE C
- ------------------------------------------------------------------------------------------------------------
1800 SHERMAN OFFICE BUILDING
RECURRING PAYABLES PRORATION
PRORATION MADE AS OF:                           11:59 PM, WEDNESDAY, AUGUST 5, 1998
- ------------------------------------------------------------------------------------------------------------
                   SERVICE CONTRACTS
                                                                                                 CREDIT DUE
                                                              BILLING PERIOD        # of DAYS     PURCHASER
VENDOR NAME                                     PAYMENT      BEGIN        END         CREDIT     or (SELLER)
- ------------------------------------------------------------------------------------------------------------
<S>                                            <C>          <C>         <C>         <C>          <C>

PAID BY SELLER

Advent Systems, Inc.                             (705.00)   06/01/98    08/31/98        26          (199.24)
Otis Elevator                                  (2,451.48)   08/01/98    08/31/98        26        (2,056.08)
Rentokil Inc.-Tropical Plant Services            (535.62)   08/01/98    08/31/98        26          (449.23)
Smithereen Exterminating Company                 (198.00)   08/01/98    10/31/98        87          (187.24)
                                                                                                  ---------

                                      CREDIT DUE TO PURCHASER (SELLER)                            (2,891.79)

PAYABLE BY PURCHASER

Admiral Security Services                       5,136.00    08/01/98    08/31/98         5           828.39
BFI Waste Systems                                 595.00    08/01/98    08/31/98         5            95.97
The Brickman Group, LTD (Landscaping)             725.00    08/01/98    08/31/98         5           116.94
H-O-H Chemicals, Inc.                              78.21    08/01/98    08/31/98         5            12.61
Illinois Recycling Service                        272.79    08/01/98    08/31/98         5            44.00
Lakeside Building Maintenance                  10,375.46    08/01/98    08/31/98         5         1,673.46
Thomas M. Tully, Ltd. (1997 Tax Appeal) (3)    15,000.00    01/01/98    12/31/98       365        15,000.00
                                                                                                  ---------

                                      CREDIT DUE TO PURCHASER (SELLER)                            17,771.37

UNION DUES AND OTHER AMOUNTS (2)

Union Dues                                         54.20    08/01/98    08/31/98         5             8.74
Educational Fund For Engineer                     200.00    06/01/98    05/31/99        66            36.16
Health and Welfare                                400.00    08/01/98    08/31/98         5            64.52
                                                                                                  ---------

                                      CREDIT DUE TO PURCHASER (SELLER)                               109.42

INCOME

Paging Network                                    750.00    08/01/98    08/31/98        26           629.03
Ameritech (1)                                       0.00    08/01/98    08/31/98        26             0.00
UPS (1)                                             0.00    08/01/98    08/31/98        26             0.00
                                                                                                  ---------

                                      CREDIT DUE TO PURCHASER (SELLER)                               629.03
                                                                                                  ---------

                                      TOTAL CREDIT DUE TO PURCHASER (SELLER)                      15,618.03
                                                                                                  =========
</TABLE>

(1) No income has been received year to date, therefore no proration as of
    closing.

(2) Union pension benefits for engineer are payable hourly. Seller will
    calculate and pay such union benefits for the period through closing
    directly to union.

(3) 1998 payment to Tully to be paid by purchaser after closing.

<PAGE>

<TABLE> 
<CAPTION> 
                                                            SCHEDULE D
- -----------------------------------------------------------------------------------------------------------------------------------
1800 SHERMAN OFFICE BUILDING
RENTAL CHARGE, DEPOSIT RECONCILIATION, AND DELINQUENCY SCHEDULE
PRORATION MADE AS OF:                           11:59 PM, WEDNESDAY, AUGUST 5, 1998
- -----------------------------------------------------------------------------------------------------------------------------------
                                                                       AUGUST       AUGUST       AUGUST
                                                         TENANT       MONTHLY   ESCALATION        OTHER         TOTAL       CHARGES
TENANT                                             DEPOSITS (2)          RENT      CHARGES       INCOME       CHARGES          PAID
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                   <C>          <C>           <C>          <C>          <C>           <C>
Academic Counseling                                    1,572.25      1,891.50       127.34       184.52      2,203.36      2,203.36
Block, Keith M.D. (Ste. 513)                                 --      3,427.00       241.01           --      3,668.01            --
Block, Keith M.D. (Ste. 390)                                 --      6,594.58       135.47       150.00      6,880.05            --
Block, Keith M.D. (Ste. 515)                           2,501.15      6,093.08       428.50       614.87      7,136.45            --
Brown, Steven Dr. S.C.                                       --      7,811.75       523.06       955.00      9,289.81      9,289.81
Cass Communications                                          --     25,643.33     2,116.35     2,710.73     30,470.41     30,470.41
Center for Women's Health (Ste. 108)                   7,345.00      7,676.25       267.94       508.50      8,452.69            --
Disciplined Investment (Ste. 209/211)                  4,458.67     13,083.63       458.48     1,200.69     14,742.80            --
Estima                                                 3,157.00      3,681.80       265.27       130.00      4,077.07            --
Evanston Medical Specialists (Ste. 404)                      --      6,068.81     1,549.83       858.10      8,476.74            --
Evanston Medical Specialists (Ste. 404A) (1)           4,755.08      3,187.61       738.79           --      3,926.40            --
Federal Express                                              --      2,766.88        48.86           --      2,815.74      2,815.74
Ferguson JH & Associates                                     --      6,610.19       491.59       195.00      7,296.78      7,296.78
Hodur, James R. D.D.S.                                 3,658.33      4,368.24       365.27       215.00      4,948.51      4,948.51
Kaffeehaus 1800 (3)                                    4,500.00      4,815.00           --       270.34      5,085.34            --
LIM Management, Inc.                                         --      1,614.58       104.46        65.00      1,784.04      1,784.04
National Equipment Services                            2,629.19      2,685.73        56.92        65.00      2,807.65      2,807.65
Olde Discount Corporation                              4,628.75      4,628.75       161.38        65.00      4,855.13      4,855.13
Papageorge Hair Salon                                  1,625.00      2,275.00        36.18       130.00      2,441.18      2,441.18
Price Marketing Group                                        --      2,515.94       207.85       246.60      2,970.39      2,970.39
Sachs Group                                                  --     34,925.38     2,063.26     1,838.62     38,827.26            --
Shared Technologies                                      241.67        870.00           --           --        870.00        870.00
St. Francis Hospital (Ste. 106)                              --      4,536.75       158.27       211.25      4,906.27            --
Systat, Inc.                                          19,034.83     18,705.00     1,847.88       325.00     20,877.88     20,877.88
Tye, Richard                                                 --      4,729.42       147.28       565.50      5,442.20      5,442.20
Winter, Arthur                                         2,626.75      3,713.63       269.98           --      3,983.61      3,983.61
Yahav, Jonathan, D.D.S.                                1,932.00      2,116.00       186.92        65.00      2,367.92      2,367.92
Yamada & Associates                                    2,411.92      2,529.00       189.38        65.00      2,783.38      2,783.38
ZS Associates (Ste. 700)                                     --     46,938.09     3,976.31     1,710.33     52,624.73     52,624.73
ZS Associates (Ste. 400)                                     --      4,799.50       110.18           --      4,909.68      4,909.68
ZS Associates (Ste. 401)                                     --     10,757.81       254.80       390.00     11,402.61     11,402.61
                                                      =============================================================================
                                                      67,077.59    252,060.23    17,528.81    13,735.05    283,324.09    177,145.01
</TABLE> 

<TABLE> 
<CAPTION> 
- -----------------------------------------------------------------------------------------------------------------------------------
                                                                        AUGUST
                                                            PR'S       & PRIOR                                   TOTAL        TOTAL
                                                         PRORATA       BALANCE      BALANCE       BALANCE         SR'S         PR'S
TENANT                                                     SHARE           O/S    PRIOR 8/1   OR 8/1 PMTS    SHARE O/S    SHARE O/S
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                   <C>           <C>           <C>          <C>           <C>          <C>
Academic Counseling                                     1,847.98            --           --            --           --           --
Block, Keith M.D. (Ste. 513)                                  --      3,668.01           --      3,668.01       591.61     3,076.40
Block, Keith M.D. (Ste. 390)                                  --      6,880.05           --      6,880.05     1,109.69     5,770.36
Block, Keith M.D. (Ste. 515)                                  --      7,136.45           --      7,136.45     1,151.04     5,985.41
Brown, Steven Dr. S.C.                                  7,791.45            --           --            --           --           --
Cass Communications                                    25,555.83            --           --            --           --           --
Center for Women's Health (Ste. 108)                          --     17,070.70     8,618.01      8,452.69     9,981.35     7,089.35
Disciplined Investment (Ste. 209/211)                         --     14,756.24        13.44     14,742.80     2,391.31    12,364.93
Estima                                                        --      4,077.07           --      4,077.07       657.59     3,419.48
Evanston Medical Specialists (Ste. 404)                       --      8,751.52       274.78      8,476.74     1,642.00     7,109.52
Evanston Medical Specialists (Ste. 404A) (1)                  --      3,926.40           --      3,926.40       633.90     3,293.11
Federal Express                                         2,361.59            --           --            --           --           --
Ferguson JH & Associates                                6,119.88            --           --            --           --           --
Hodur, James R. D.D.S.                                  4,150.36            --           --            --           --           --
Kaffeehaus 1800 (3)                                           --      5,085.34           --      5,085.34       820.22     4,265.12
LIM Management, Inc.                                    1,496.29            --           --            --           --           --
National Equipment Services                             2,354.80            --           --            --           --           --
Olde Discount Corporation                               4,072.04            --           --            --           --           --
Papageorge Hair Salon                                   2,047.44            --           --            --           --           --
Price Marketing Group                                   2,491.29            --           --            --           --           --
Sachs Group                                                   --     40,428.15     1,600.89     38,827.26     7,863.35    32,564.80
Shared Technologies                                       729.68            --           --            --           --           --
St. Francis Hospital (Ste. 106)                               --      9,812.54     4,906.27      4,906.27     5,697.60     4,114.94
Systat, Inc.                                           17,510.48            --           --            --           --           --
Tye, Richard                                            4,564.43            --           --            --           --           --
Winter, Arthur                                          3,341.09            --           --            --           --           --
Yahav, Jonathan, D.D.S.                                 1,986.00            --           --            --           --           --
Yamada & Associates                                     2,334.45            --           --            --           --           --
ZS Associates (Ste. 700)                               44,136.87            --           --            --           --           --
ZS Associates (Ste. 400)                                4,117.80            --           --            --           --           --
ZS Associates (Ste. 401)                                9,563.48            --           --            --           --           --
                                                      =============================================================================
                                                      148,573.23    121,592.47    15,413.39    106,179.08    32,539.05    89,053.42
</TABLE> 

NOTES:
- ------
       
(1) Evanston Medical (Ste. 404A) has an installment note payment of $982.48 due
on the first of the month through November 1, 1998 due 100% to seller, seller
will retain such note. Seller has not collected for August, 1998.

(2) Paging Network also has a security deposit of $500.00.

(3) Kaffeehaus 1800 cancelled one space as of 8/1/98, is now only renting two
spaces.
<PAGE>
                                  SCHEDULE E
- -------------------------------------------------------------------------------

1800 SHERMAN OFFICE BUILDING
PARKING TAX-(7/21/98-8/31/98)
PRORATION MADE AS OF:                  11:59 PM, WEDNESDAY, AUGUST 5, 1998

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------
                                           AUGUST                                           TOTAL
                                          PARKING     CHARGES   BALANCE       BALANCE        PR'S
TENANT                                        TAX        PAID   PRIOR 8/1 FOR 8/1 PMTS  SHARE O/S
- -------------------------------------------------------------------------------------------------
<S>                                       <C>         <C>       <C>       <C>           <C>
Academic Counseling                          4.00        4.00           -            -          -

Block, Keith M.D. (Ste. 513)                    -           -           -            -          -

Block, Keith M.D. (Ste. 390)                30.00           -           -        30.00      30.00

Block, Keith M.D.(Ste. 515)                 40.00           -           -        40.00      40.00

Brown, Steven Dr. S.C.                     228.00      228.00           -            -          -

Cass Communications                        100.00      100.00           -            -          -

Center for Women's Health (Ste. 106)        82.00           -      183.68        82.00     265.68

Disciplined Investment                      70.00           -           -        70.00      70.00

Estima                                       8.00           -           -         8.00       8.00

Evanston Medical Specialists (Ste. 404)     24.00           -       54.00        24.00      78.00

Evanston Medical Specialists (Ste. 404)(1)      -           -           -            -          -

Federal Express                                 -           -           -            -          -

Ferguson JH & Associates                    12.00       12.00           -            -          -

Hodur, James R. D.D.S.                      64.00       64.00           -            -          -

Kaffeehaus 1800                              8.00           -           -         8.00       8.00

LIM Management, Inc.                         4.00        4.00           -            -          -

National Equipment Services                  4.00        4.00           -            -          -

Olde Discount Corporation                    4.00        4.00           -            -          -

Paging Network of Illinois                      -           -           -            -          -

Papageorge Hair Salon                        8.00        8.00           -            -          -

Price Marketing Group                        8.00        8.00           -            -          -

Sachs Group                                 48.00           -           -        48.00      48.00

Shared Technologies                             -           -           -            -          -

St. Francis Hospital (Ste. 106)             20.00           -       20.00        20.00      40.00

Systat, Inc.                                20.00       20.00           -            -          -

Tye Richard                                 44.00       44.00           -            -          -

Winter, Arthur                                  -           -           -            -          -

Yahav, Jonathan, D.D.S.                      4.00        4.00           -            -          -

Yamada & Associates                          4.00        4.00           -            -          -

ZS Associates (Ste. 700)                   104.00      104.00           -            -          -

ZS Associates (Ste. 400)                        -           -           -            -          -

ZS Associates (Ste. 401)                    24.00       24.00           -            -          -
                                          -------------------------------------------------------
                                           966.00      636.00      257.68       330.00     587.68

PARKING TAX COLLECTED 7/21/98-7/31/98                  248.00
                                                       ======
TOTAL                                                  884.00

</TABLE>


<PAGE>
 
                                 1800 SHERMAN
                              EVANSTON, ILLINOIS

                          REAL ESTATE SALE AGREEMENT
                          --------------------------

     THIS REAL ESTATE SALE AGREEMENT (this "Agreement") is made as of the ____
day of July, 1998, by and between AMERICAN NATIONAL BANK AND TRUST COMPANY OF
CHICAGO, NOT PERSONALLY, BUT SOLELY AS TRUSTEE ("Trustee") UNDER TRUST AGREEMENT
DATED MARCH 14, 1991 AND KNOWN AS TRUST NUMBER 113531-09 ("Trust"), 1800 SHERMAN
ASSOCIATES, an Illinois general partnership ("Beneficiary"; Trust and
Beneficiary are collectively referred to herein as "Seller"), and PRENTISS
PROPERTIES ACQUISITION PARTNERS, L.P., a Delaware limited partnership
("Purchaser").

                                   RECITALS
                                   --------

A.   The Trust is the owner of record title to that certain parcel of real
estate (the "Real Property") located in Evanston, Illinois, which Real Property
is more particularly described in EXHIBIT A attached hereto and made a part
hereof, and upon which is situated an office building commonly known as 1800
Sherman (the "Office Building").

B.   Beneficiary is the sole beneficiary of the Trust.

C.   Seller desires to sell to Purchaser, and Purchaser desires to purchase from
Seller, the Property (as such term is defined in Section 1 below), each in
accordance with and subject to the terms and conditions set forth in this
Agreement.

     THEREFORE, in consideration of the above Recitals, the mutual covenants and
agreements herein set forth and the benefits to be derived therefrom, and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, Purchaser and Seller agree as follows:

1.   PURCHASE AND SALE
     -----------------

     Subject to and in accordance with the terms and conditions set forth in
this Agreement, Purchaser shall purchase from Seller and Seller shall sell to
Purchaser the Real Property, together with: (a) the Office Building and all
other improvements owned by Seller and located thereon and any and all of
Seller's rights, easements, licenses and privileges presently thereon or
appertaining thereto; (b) Seller's right, title and interest as Landlord in and
to the leases and other agreements permitting the use or occupancy of space at
the Property or any part thereof (excluding Revenue Agreements [as hereinafter
defined]) (individually, a "Lease", and collectively, the "Leases"); (c) the
interest of Seller in all security deposits paid by tenants under the Leases or
by licensees or other parties to the Revenue Agreements that are listed on
EXHIBIT N attached hereto and which are not applied by Seller in accordance with
the terms of the applicable Leases or Revenue Agreements and/or applicable law
between the date of this Agreement and Closing (the "Security Deposits"); (d)
all of the furniture, furnishings, fixtures, equipment, maintenance vehicles,
tools and other tangible personalty located on the Property and used in
connection therewith that are listed on EXHIBIT K attached hereto (the "Tangible
Personal Property"); (e) all right, title and interest of Seller under any and
all of the maintenance, service, leasing, brokerage, advertising, supply,
management, utility, union, employment and other like contracts and agreements
with respect to the ownership and operation of the Property that are listed on
EXHIBIT C attached hereto (collectively, the "Operating Contracts") and the
license and/or lease

                                       1
<PAGE>
 
agreements permitting the placement of communications-related equipment in, on
or at the Property and/or permitting the placement of drop-off boxes and/or such
other miscellaneous revenue-producing agreements (collectively, the "Revenue
Agreements") that are listed on EXHIBIT C attached hereto (the Operating
Contracts and the Revenue Agreements are collectively referred to herein as the
"Service Contracts"); (f) if and to the extent transferable, all of Seller's
interest, if any, in and to all warranties and guaranties relating to the
Property, if any; (g) if and to the extent transferable, all of Seller's
interest, if any, in and to all plans, specifications and floor plans for the
Office Building located at the Office Building, if any; and (h) if and to the
extent transferable, all of Seller's right, title and interest in and to any
existing intangible property pertaining to the Property (the "Intangible
Personal Property"), including the name "1800 Sherman", but specifically
excluding any intangible property pertaining in any way to the rights associated
with the name "Equity Office" or the name of any entity containing the words
"Equity Office" as a part thereof; all to the extent applicable to the period
from and after the Closing (as such term is defined in Section 4(A) below). The
Real Property, together with items (a) through (h) above, shall be collectively
referred to in this Agreement as the "Property". The term "Property" expressly
excludes: (i) all property owned by tenants or other users or occupants of the
Property (except to the extent that any Security Deposits are deemed to be
"owned" by a tenant under applicable law); (ii) all rights with respect to any
refund of real estate taxes applicable to real estate taxes payable with respect
to 1997 (that is, real estate taxes for 1997 payable in 1998) and prior years
subject, however, to the rights of tenants with respect to same; and (iii) all
computers and computer-related equipment located at the management office of the
Property.

2.   PURCHASE PRICE
     --------------

     The purchase price to be paid by Purchaser to Seller for the Property is
Fourteen Million Eight Hundred Thousand Dollars ($14,800,000) (the "Purchase
Price"). The Purchase Price shall be paid as follows:

     A.   Earnest Money.
          ------------- 

          (i)  Prior to the date of this Agreement, Purchaser and Equity Office
     Properties Management Corp., a Delaware corporation ("EOPMC"), on behalf of
     Seller, entered into that certain letter of intent (the "Letter of Intent")
     dated as of May 4, 1998 and accepted by Purchaser on May 6, 1998.
     Purchaser, pursuant to the Letter of Intent, has deposited initial earnest
     money in the amount of One Hundred Thousand Dollars ($100,000) (the
     "Initial Earnest Money") with the Chicago, Illinois office of Chicago Title
     and Trust Company (the "Escrowee"). Upon execution of this Agreement,
     Purchaser shall deposit additional earnest money in the amount of One
     Hundred Fifty Thousand Dollars ($150,000) (the "Additional Earnest Money";
     the Initial Earnest Money and the Additional Earnest Money, together with
     any interest accrued thereon, net of investment costs, if any, are
     collectively referred to herein as the "Earnest Money") with the Escrowee.
     To direct the Escrowee as to the retention, investment and disbursement of
     the Earnest Money, Purchaser, Seller and Escrowee entered into that certain
     joint order escrow agreement (the "Joint Order Escrow Agreement"), a copy
     of which is attached hereto as EXHIBIT D. The Earnest Money shall be
     invested as Seller and Purchaser so direct pursuant to the terms and
     provisions of the Joint Order Escrow Agreement. Any and all interest earned
     on the Earnest Money shall be reported to Purchaser's federal tax
     identification number.

          (ii) If the transaction closes in accordance with the terms of this
     Agreement, at Closing, the Earnest Money shall be delivered by Escrowee to
     Seller as part payment of the Purchase Price. If the transaction fails to
     close due to a default on the part of Purchaser and Seller is not otherwise
     in material default hereunder, Seller shall have the remedies provided for

                                       2
<PAGE>
 
     in Section 7(B) below. If the transaction fails to close due to a default
     on the part of Seller and Purchaser is not otherwise in material default
     hereunder, Purchaser shall have the remedies provided for in Section 7(A)
     below. If the transaction fails to close for any other reason other than as
     provided in the two (2) preceding sentences, the Earnest Money shall be
     delivered by Escrowee to Purchaser.

     B.   Cash at Closing. At Closing, Purchaser shall pay to Seller, by wire
     transferred current federal funds, an amount equal to the Purchase Price,
     minus the sum of the Earnest Money which Seller receives at Closing from
     the Escrowee, and plus or minus, as the case may require, the closing
     prorations and adjustments to be made pursuant to Section 4(C) below.

3.   EVIDENCE OF TITLE
     -----------------

     A.   Title Commitment. Seller has, prior to the date of this Agreement,
     obtained and caused to be delivered to Purchaser a commitment for an ALTA
     Owner's Title Insurance Policy (the "Title Commitment"), order number 1401
     007741071 D1, with an effective date of May 26, 1998, in the amount of the
     Purchase Price, issued by the Chicago, Illinois office of Chicago Title
     Insurance Company (the "Title Insurer"), together with copies of all
     underlying documents set forth therein (the "Title Documents"). At Closing,
     the conveyance of the Property to Purchaser shall be subject only to those
     exceptions to title which are more fully described on attached EXHIBIT B
     (the "Existing Permitted Exceptions") and those exceptions to title which
     become Permitted Exceptions pursuant to Section 3(C) below (collectively,
     the "Permitted Exceptions").

     B.   Survey. Seller has, prior to the date of this Agreement, obtained and
     caused to be delivered to Purchaser an updated survey of the Real Property
     prepared by B.H. Suhr & Company, Inc., dated May 15, 1998, Order No. 98-482
     (the "Survey"). To the extent not already so certified, the Survey shall be
     revised so that it contains a certification in the form of EXHIBIT V
     attached hereto.

     C.   Review of Title Commitment and Survey. Purchaser has reviewed the pro
     forma title policy (the "Pro Forma") dated June 25, 1998 derived from the
     Title Commitment and has reviewed the Survey; the matters disclosed therein
     comprise the Existing Permitted Exceptions. If any additional exceptions to
     title other than the Existing Permitted Exceptions (such exceptions to
     title being referred to herein as the "New Disclosed Exceptions") arise
     between the date of the Title Commitment, the Survey and the Closing,
     Purchaser shall have five (5) business days after its receipt of notice of
     same within which to notify Seller of any such New Disclosed Exceptions to
     which Purchaser objects. Any such New Disclosed Exceptions not objected to
     by Purchaser as aforesaid shall become "Permitted Exceptions" hereunder. If
     Purchaser objects to any such New Disclosed Exceptions, Seller shall have
     until Closing (but in any event at least twenty [20] days after it receives
     notice of Purchaser's objection(s)) to remove such New Disclosed
     Exceptions, which removal may be accomplished by waiver or endorsement by
     the Title Insurer reasonably acceptable to Purchaser. If Seller fails to
     remove any such New Disclosed Exceptions as aforesaid, Purchaser may, as
     its sole and exclusive remedy (subject, however, to Section 7(A)(ii)
     below), terminate this Agreement and obtain a return of the Earnest Money.
     If Purchaser does not elect to terminate this Agreement, Purchaser shall
     consummate the Closing and accept title to the Property subject to all such
     New Disclosed Exceptions (in which event, all such New Disclosed
     Exceptions, together with the Existing Permitted Exceptions, shall be
     deemed "Permitted Exceptions" hereunder).

                                       3
<PAGE>
 
4.   CLOSING
     -------

     A.   Closing Date. The "Closing" of the transaction contemplated by this
     Agreement (that is, the payment of the Purchase Price, the transfer of
     title to the Property, and the satisfaction of all other terms and
     conditions of this Agreement) shall occur on August 6, 1998, at the office
     of the Escrowee (in person and/or by telecopy and/or overnight courier) or
     at such other time and place as Seller and Purchaser shall agree in
     writing. The "Closing Date" shall be the date of Closing. If the date for
     Closing above provided for falls on a Saturday, Sunday or legal holiday,
     then the Closing Date shall be the next business day.

     B.   Closing Documents and Deliveries.
          -------------------------------- 

          (i)  Seller. At Closing, Seller shall deliver to Purchaser the
     following:

               (a)  a trustee's deed (the "Deed"), subject only to the Permitted
          Exceptions;

               (b)  a limited warranty bill of sale (the "Bill of Sale") in the
          form attached hereto as EXHIBIT J;

               (c)  a letter advising tenants under the Leases of the change in
          ownership of the Property in the form of EXHIBIT L attached hereto;

               (d)  a letter advising vendors under the Service Contracts of the
          change in ownership of the Property in the form of EXHIBIT M attached
          hereto;

               (e)  four (4) counterparts of an assignment and assumption of the
          Leases and Security Deposits in the form of EXHIBIT E attached hereto
          (the "Lease Assignment"), executed by Seller;

               (f)  four (4) counterparts of an assignment and assumption of the
          Service Contracts in the form of EXHIBIT F attached hereto (the
          "Service Contract Assignment"), executed by Seller;

               (g)  an affidavit stating, under penalty of perjury, Seller's
          U.S. taxpayer identification number and that Seller is not a foreign
          person within the meaning of Section 1445 of the Internal Revenue
          Code;

               (h)  four (4) counterparts of a closing statement (the "Closing
          Statement") to be executed by Seller and Purchaser, containing the
          Closing Delinquency Schedule (as defined in Section 4(C)(i)(b) below)
          and setting forth the prorations and adjustments to the Purchase Price
          as required by Section 4(C) below, executed by Seller;

               (i)  all executed Estoppel Certificates (as defined in Section
          8(B)(i) below) received by Seller as of the Closing Date to the extent
          not previously delivered to Purchaser or its counsel;

               (j)  four (4) counterparts of a letter with respect to Seller's
          delivery of information required under 29 C.F.R.
          (S)1910.1001(j)(2)(ii) and 29 C.F.R. (S)1926.1101(n)(6) (the "OSHA
          Letter") in the form of EXHIBIT O attached hereto, executed by Seller;

                                       4
<PAGE>
 
               (k)  four (4) counterparts of a Quit Claim Assignment of Permits
          and General Intangibles (the "Permit Assignment") in the form of
          EXHIBIT R attached hereto;

               (l)  any transfer tax declaration, real property conveyance
          statement or similar document (the "Transfer Tax Declarations") that
          Seller is required by law to execute in order to record the Deed with
          the Cook County, Illinois recorder, executed by Seller;

               (m)  a certification of Seller (the "Closing Certification")
          updating the representations of Seller set forth in Section 9(A) below
          to reflect any changes in any of such representations since the
          effective date of such representations which would make such
          representations untrue or incorrect in any material respect as of the
          Closing Date, including an update of the Rent Roll (as defined in
          Section 9(A)(v) below) (Purchaser hereby acknowledging that:  (1)
          Seller shall have no liability with respect to the information set
          forth in such Closing Certification to the extent that such
          information is set forth in an Estoppel Certificate received by
          Purchaser, and (2) as more particularly provided in Section 9(C)
          below, Seller's liability under such Closing Certification shall
          terminate on a date no later than the two hundred seventieth (270th)
          day after the Closing Date);

               (n)  to the extent located at the Property or otherwise in
          Seller's possession, original counterparts of each of the Leases;

               (o)  copies of those Leases for which either (1) original Leases
          were not delivered as provided in Section 4(B)(i)(n) above, or (2)
          Estoppel Certificates were not received by Seller or Purchaser prior
          to the Closing Date, certified by Seller to be true and correct
          (Purchaser hereby acknowledging that, as more particularly provided in
          Section 9(C) below, Seller's liability under such certifications shall
          terminate on a date no later than the two hundred seventieth (270th)
          day after the Closing Date);

               (p)  to the extent located at the Property or otherwise in
          Seller's possession, original counterparts of each of the Service
          Contracts;

               (q)  to the extent located at the Property, keys and as-built
          plans for the Property;

               (r)  to the extent located at the Property, copies of
          correspondence to or from parties to the Service Contracts and
          correspondence to or from tenants under the Leases;

               (s)  three (3) counterparts of the Post-Closing Escrow Agreement
          (defined in Section 10(P) below), executed by Seller; and

               (t)  a copy of the general ledger with respect to the Building
          from January 1, 1998 through June 30, 1998 prepared by EOPMC
          (Purchaser hereby acknowledging that Seller shall not be deemed to
          have made any representations, warranties or other statements with
          respect to such general ledger and shall have no liability to
          Purchaser with respect thereto and Purchaser shall not be entitled to
          rely thereon or provide copies of such general ledger to other parties
          without Seller's express written consent).

                                       5
<PAGE>
 
          (ii)  Purchaser. Purchaser shall deliver or cause to be delivered to
     Seller at Closing:

                (a) the funds required pursuant to Section 2(B) above;

                (b) four (4) counterparts of the Lease Assignment, executed by
          Purchaser;

               (c) four (4) counterparts of the Service Contract Assignment,
          executed by Purchaser;

               (d) four (4) counterparts of the Closing Statement, executed by
          Purchaser;

               (e) copies of any executed Estoppel Certificates received by
          Purchaser as of the Closing Date, if any;

               (f) four (4) counterparts of the OSHA Letter, executed by
          Purchaser;

               (g) four (4) counterparts of the Permit Assignment, executed by
          Purchaser;

               (h) the Transfer Tax Declarations, executed by Purchaser; and

               (i) three (3) counterparts of the Post-Closing Escrow Agreement,
          executed by Purchaser.

     C.   Closing Prorations and Adjustments.
          ---------------------------------- 

          (i)  General. The following items are to be prorated or adjusted (as
     appropriate) as of the Closing Date, it being understood that for purposes
     of prorations and adjustments, Purchaser shall be deemed the owner of the
     Property as of the Closing Date and Seller shall be deemed the owner of the
     Property as of the day prior to the Closing Date; provided, however, that
     in the event that Escrowee receives the net closing funds from Purchaser
     after 11 AM (Chicago, Illinois time) on the Closing Date and, as a result
     of Escrowee receiving such funds after such time Seller is unable to invest
     the net proceeds from the transaction with Seller's bank or the closing
     escrowee on the Closing Date, then, for purposes of prorations and
     adjustments, Seller shall be deemed the owner of the Property as of the
     Closing Date and Purchaser shall be deemed the owner of the Property as of
     the day after the Closing Date:

               (a)  Intentionally Omitted;

               (b)  the "minimum" or "base" rent payable by tenants under the
          Leases ("Base Rent"); provided, however, that rent and all other sums
          which are due and payable to Seller by any tenant but uncollected as
          of the Closing shall not be adjusted, but Purchaser shall cause the
          rent and other sums for the period prior to Closing to be remitted to
          Seller if, as and when collected, but only after such rents are first
          applied towards any unpaid rents first becoming due and payable
          subsequent to the Closing Date. At Closing, the Closing Statement
          shall contain a schedule (the "Closing Delinquency Schedule") of all
          such past due but uncollected rent and other sums owed by tenants (the
          "Past Due Rents"). Purchaser shall include the amount of the Past Due
          Rents in the first bills thereafter submitted to the tenants in
          question after the Closing and shall continue to do so for six (6)
          months thereafter. Purchaser shall promptly deliver to Seller a copy
          of each such bill submitted to tenants. Purchaser shall promptly remit
          to Seller any such Past Due Rents paid by tenants set forth on the
          Closing

                                       6
<PAGE>
 
          Delinquency Schedule, but only if a deficiency in the then current
          rent is not thereby created. To the extent not set forth on the
          Closing Delinquency Schedule, percentage rent shall be prorated as
          follows: upon receipt by Purchaser, Purchaser shall furnish to Seller
          copies of all sales reports from tenants relative thereto, including,
          without limitation, all sales reports with respect to any tenants
          whose lease years have expired as of the Closing but whose sales
          reports were not available on Closing and sales reports of any tenants
          whose lease year expires after Closing, and the amount of any rents
          (including, without limitation, percentage or overage rents and
          Tenants Reimbursements) to be paid by any tenant shall be made in
          accordance with such tenant's Lease as now existing (Purchaser hereby
          covenanting and agreeing not to modify the Leases after Closing to
          change the date and/or method for payment of such amounts with respect
          to the period prior to Closing until after the occurrence of the
          reprorations described in Section 4(C)(ii) below) and Purchaser shall,
          after Closing and prior to the occurrence of the reprorations
          described in Section 4(C)(ii) below, promptly pay to Seller a prorata
          portion of such rents, based upon apportionment being made as of the
          Closing Date, promptly after the date when such rents are received
          from the tenant;

               (c)  with respect to tenant improvement costs and/or allowances
          or leasing commissions relating to any new leases, or any
          modification, amendment, restatement or renewal of existing Leases
          (each, a "New Lease", and collectively, the "New Leases") as set forth
          in a New Lease Notice (defined in Section 10(L)(1) below) executed
          between the date of this Agreement and Closing with the consent of
          Purchaser granted (or deemed to be granted) in accordance with Section
          10(L)(1) below, Seller and Purchaser agree that such costs, allowances
          and leasing commissions shall be prorated over the initial term of any
          such New Lease with Seller being responsible for a portion of such
          costs, allowances and leasing commissions based on the ratio of Base
          Rent payments received by Seller through the Closing Date to the total
          Base Rent payable over the initial term of the particular New Lease
          and, in the event that Seller has paid such costs, allowances and/or
          leasing commissions prior to Closing, Purchaser shall reimburse Seller
          at Closing for the amount of any such costs, allowances and/or leasing
          commissions paid by Seller, based on the above-described proration
          and, in the event Seller has not paid such costs, allowances and/or
          leasing commissions prior to Closing, Purchaser shall be responsible
          for payment of all such costs, allowances and leasing commissions
          after Closing;

               (d)  with respect to the tenant improvement costs and/or
          allowances or leasing commissions set forth on EXHIBIT S and EXHIBIT T
          attached hereto relating to the Leases set forth on EXHIBIT S and
          EXHIBIT T attached hereto, Seller and Purchaser agree that Purchaser
          shall be responsible for all such costs, allowances and leasing
          commissions and: (1) in the event that Seller has, prior to Closing,
          paid a portion of such costs, allowances and/or leasing commissions,
          Purchaser shall reimburse Seller at Closing for the amount of any such
          costs, allowances and/or leasing commissions paid by Seller prior to
          Closing; and (2) in the event that Seller has not, prior to Closing,
          paid any such costs, allowances and/or leasing commissions, Purchaser
          shall be responsible after Closing for payment of all unpaid amounts
          to the proper recipients thereof;

               (e)  the amount of the Security Deposits, if any, with Purchaser
          receiving a credit at Closing against the Purchase Price in the amount
          of such Security Deposits;

               (f)  water, sewer, electric, telephone and all other utility and
          fuel charges, fees and use charges, fuel on hand (at cost plus sales
          tax), and any deposits with utility 

                                       7
<PAGE>
 
          companies (to the extent possible, utility prorations will be handled
          by meter readings on the day immediately preceding the Closing Date);

               (g)  amounts paid or payable under the Service Contracts;

               (h)  assignable license and permit fees, if any;

               (i)  salary, vacation, sick pay and/or all other amounts paid or
          payable under the Union Contract, the New Global Union Contract or the
          new union contract (as such terms are defined in Section 10(Z) below),
          as applicable; and

               (j)  other similar items and expenses of operation (excluding
          real estate taxes).

          (ii) Tenant Reimbursements Other Than Real Estate Taxes.
     Notwithstanding the foregoing and subject to Sections 4(C)(ii)(a), 4(C)(iv)
     and 4(C)(v) below, at Closing, Seller shall be entitled to retain amounts
     paid by tenants for reimbursement of common area maintenance, mall
     maintenance, utility charges, water and sewer charges, insurance and
     merchant's association dues and assessments and all other charges to or
     contributions by tenants under the Leases other than Base Rent, percentage
     rent and real estate taxes and assessments (such assessments, costs,
     expenses, dues and charges being referred to herein as the "Tenant
     Reimbursable Expenses", and the amounts payable by tenants under the Leases
     with respect to the Tenant Reimbursable Expenses being referred to herein
     as the "Tenant Reimbursements") as of the Closing.

               (a)  All Tenant Reimbursements with respect to the month in which
          the Closing Date occurs which are received by Seller prior to or on
          the Closing Date shall be prorated at Closing as between Seller and
          Purchaser based on the number of days in the month with Purchaser
          receiving a credit against the Purchase Price for a proportionate
          share of such Tenant Reimbursements, based on the number of days of
          each party's ownership. Such credit shall be subject to reproration as
          provided in Section 4(C)(iv) below. In addition, in the event that
          Seller receives, prior to or on the Closing Date, prepayments of
          Tenant Reimbursements expressly designated by the tenant as applicable
          to the month after Closing or any period thereafter and such tenant
          does not owe any Past Due Rents, Purchaser shall receive a credit
          against the Purchase Price for such Tenant Reimbursements, subject,
          however, to the reproration provided for in Section 4(C)(iv) below. If
          such tenant owes Past Due Rents, such Tenant Reimbursements shall
          first be applied against Past Due Rents, with any remaining amounts
          being credited against the Purchase Price at Closing, subject,
          however, to the reproration provided in Section 4(C)(iv) below. Any
          Tenant Reimbursements received by Purchaser on or after the Closing
          Date shall be retained by Purchaser until the post-Closing adjustments
          provided for in Section 4(C)(iv) below.

          (iii)  Real Estate Taxes. Notwithstanding anything herein to the
     contrary, real estate taxes and assessments and amounts paid by tenants for
     reimbursement of real estate taxes and assessments ("Real Estate Tax
     Reimbursements") shall be addressed as follows:

               (a)  Proration of Real Estate Tax Expense.
                    ------------------------------------ 

                    (1)  Second Installment of 1997 Real Estate Taxes.
               Purchaser shall be responsible for payment of the second
               installment of 1997 real estate taxes

                                       8
<PAGE>
 
               (payable in 1998) for the Property. At Closing, Purchaser shall
               receive a credit against the Purchase Price in the amount of Five
               Hundred Fifty Thousand Dollars ($550,000.00) with respect to the
               second installment of 1997 real estate taxes for the Property
               (payable in 1998). Such credit shall not be subject to proration
               at or after Closing.

                    (2)  1998 Real Estate Taxes. After Closing, Purchaser shall
               be responsible for payment of all 1998 real estate taxes for the
               Property (payable in 1999). 1998 real estate taxes shall not be
               subject to proration at or after Closing.

               (b)  Seller to Retain All Real Estate Tax Reimbursements for
          Periods Prior to Month of Closing. Notwithstanding any provision of
          this Agreement to the contrary and subject to any refunding of same to
          tenants required in connection with the appeal of real estate taxes
          with respect to 1997 and prior years, Seller shall be entitled to
          retain all Real Estate Tax Reimbursements paid by tenants as of
          Closing with respect to all periods prior to the month in which the
          Closing Date occurs.

               (c)  Real Estate Tax Reimbursements for Month of Closing. All
          Real Estate Tax Reimbursements with respect to the month in which the
          Closing Date occurs which are received by Seller prior to or on the
          Closing Date shall be prorated at Closing as between Seller and
          Purchaser based on the number of days in the month with Purchaser
          receiving a credit against the Purchase Price based on the number of
          days in the month with Purchaser receiving a credit against the
          Purchase Price for a proportionate share of such Real Estate Tax
          Reimbursements, based on the number of days of each party's ownership.
          Such credit shall not be subject to reproration. In addition, in the
          event that Seller receives, prior to or on the Closing Date,
          prepayments of Real Estate Tax Reimbursements expressly designated by
          the tenant as applicable to the month after Closing or any period
          thereafter and such tenant does not owe any Past Due Rents, Purchaser
          shall receive a credit against the Purchase Price for such Real Estate
          Tax Reimbursements. If such tenant owes Past Due Rents, such Real
          Estate Tax Reimbursements shall first be applied against Past Due
          Rents, with any remaining amounts being credited against the Purchase
          Price. In the event that Purchaser receives any Real Estate Tax
          Reimbursements on or after the Closing Date, and such amounts are with
          respect to the month in which the Closing Date occurs, Purchaser shall
          remit Seller's proportionate share of such Real Estate Tax
          Reimbursements, calculated as provided above, to Seller upon the
          reconciliation described in Section 4(C)(iv) below.

               (d)  Purchaser to Retain All Real Estate Tax Reimbursements for
          Periods After the Month of Closing. Purchaser shall be entitled to
          retain all Real Estate Tax Reimbursements paid by tenants after
          Closing with respect to all periods after the month in which the
          Closing Date occurs. Purchaser shall be responsible for reconciling
          with tenants for all Real Estate Tax Reimbursements paid by tenants
          during 1998 and subsequent years and refunding any overpayments by
          tenants of such amounts (whether paid to Seller or Purchaser).
          Purchaser agrees to indemnify, defend and hold Seller, EOPMC and their
          respective partners, shareholders, officers, directors, employees and
          affiliates harmless of, from and against any and all claims, demands,
          suits and causes of actions by tenants with respect to Real Estate Tax
          Reimbursements paid by tenants during 1998 and subsequent years
          including, without limitation, Purchaser's failure to refund any
          overpayments by tenants as provided in the previous sentence.

                                       9
<PAGE>
 
          (iv)   Post-Closing Reprorations.
                 ------------------------- 

                 (a)  General. As soon as practical after Closing, but in no
          event later than May 31, 1999, Seller and Purchaser shall, with
          respect to any amounts prorated or adjusted at Closing pursuant to
          Section 4(C)(i) above based on estimates or formulae, as applicable,
          jointly determine and reapportion such amounts in accordance with
          Section 4(C)(i) above upon determination of the actual costs or
          expenses with respect thereto. In the event that amounts (other than
          Tenant Reimburseable Expenses and related Tenant Reimbursements)
          credited to Purchaser by Seller at Closing exceeds the amount of the
          credit that Purchaser should have received had such actual amounts
          been available at Closing, Purchaser shall promptly remit such excess
          amount to Seller. In the event that amounts (other than Tenant
          Reimburseable Expenses and related Tenant Reimbursements) credited to
          Seller by Purchaser at Closing exceeds the amount of the credit that
          Seller should have received at Closing had such actual amounts been
          available at Closing, Seller shall promptly remit such excess amount
          to Purchaser.

                 (b)  Tenant Reimbursements; Tenant Reimbursable Expenses.
          Seller's allocable share of Tenant Reimbursements for Leases in effect
          as of the Closing Date shall be determined by multiplying the total
          payments due from tenants for the 1998 calendar year (that is, the sum
          of estimated payments plus or minus year-end adjustments) by a
          fraction, the numerator of which is the actual Tenant Reimburseable
          Expenses paid by Seller (whether by direct payment by Seller or by
          proration as provided in Section 4(C)(i) above), and the denominator
          of which is the total Tenant Reimburseable Expenses for calendar year
          1998. In the event that, after such determination: (1) the amount of
          Tenant Reimbursements retained by Seller as provided in Section
          4(C)(ii) above is less than the amount of Tenant Reimburseable
          Expenses paid by Seller (whether by direct payment by Seller or by
          proration as provided in Section 4(C)(i) above) with respect to 1998
          and the landlord under the Leases is entitled to recover such
          difference under the terms of Leases, then (y) to the extent that the
          Tenant Reimbursements collected by Purchaser for 1998 exceeds the
          Tenant Reimbursable Expenses incurred by Purchaser for 1998, Purchaser
          shall promptly remit to Seller its excess collections to the extent
          that the Tenant Reimbursements retained by Seller are less than the
          Tenant Reimbursable Expenses paid by Seller, and (z) Purchaser shall
          bill such tenants for any remaining amounts owed to Seller after any
          payment provided for in sub-clause (y) of this sentence, provide
          Seller with copies of such bills upon issuance, and collect such
          amounts on behalf of Seller and, upon receipt, remit such collected
          amounts to Seller (it being understood that, in the event that the
          tenant remits such amounts to Purchaser without specification as to
          the period to which such amounts are applicable, Purchaser shall be
          permitted to apply such amounts to any 1998 Tenant Reimbursements owed
          to Purchaser with the remainder, if any, being paid to Seller); and
          (2) the amount of Tenant Reimbursements collected by Seller for 1998
          and retained by Seller as provided in Section 4(C)(ii) above exceeds
          the amount of Tenant Reimburseable Expenses paid by Seller (whether by
          direct payment by Seller or by proration as provided in Section
          4(C)(i) above) with respect to 1998 then, to the extent Purchaser
          incurred Tenant Reimbursable Expenses in 1998 in excess of Tenant
          Reimbursements collected by Purchaser for 1998, Seller shall promptly
          remit to Purchaser its excess collections and, thereafter, to the
          extent required under the terms of the Leases, Seller shall promptly
          remit any remaining excess amounts to the applicable tenants; provided
          that, if any such excess amounts are otherwise payable to tenants
          owing Past Due Rents, prior to remitting any remaining amounts to such
          tenants, Seller may offset the amounts due to such tenants against
          Past Due Rents owing to Seller and

                                      10
<PAGE>
 
          remitting any remaining amounts to Purchaser to be applied against
          past due rents owed Purchaser with any remaining amounts to be
          remitted by Purchaser to such tenants.

          (v)    Seller has Reconciled 1997 Tenant Reimbursable Expenses and
     Tenant Reimbursements. Seller has, prior to the date of this Agreement,
     calculated: (1) the actual Tenant Reimbursements and Tenant Reimbursable
     Expenses for the calendar year 1997; and (2) the actual real estate taxes
     paid in 1997 as well as the Real Estate Tax Reimbursements paid in 1997,
     and reconciled such items with tenants. Seller agrees to indemnify, defend
     and hold Purchaser, its general partner, and their respective partners,
     shareholders, officers, directors, employees and affiliates harmless of,
     from and against any and all claims, demands, suits and causes of actions
     by tenants with respect to Seller's failure to refund any overpayments by
     tenants in connection with the reconciliations described in the previous
     sentence.

          (vi)   Past Due Rents. If Seller has not received all Past Due Rents
     or other amounts owed to it by tenants within sixty (60) days after the
     Closing Date or within sixty (60) days after such other amounts may be due,
     Seller at its sole cost and expense, shall be entitled at any time within
     the twelve (12) month period after the applicable sixty (60) day period, to
     commence such actions or proceedings not affecting possession or enforcing
     landlord's liens or resulting in termination of the Lease in question as
     Seller shall desire to collect any such Past Due Rents or other amounts,
     and Purchaser shall cooperate with Seller in any such action, provided that
     Purchaser shall not be obligated to expend any amounts in connection
     therewith.

          (vii)  Tax Appeals Prior Tax Years. Prior to the date hereof, Seller
     filed an appeal of the assessed value(s) of the Property with respect to
     the tax and/or calendar years set forth in items 1 and 2 on EXHIBIT U
     attached hereto and requesting a corresponding reduction in real estate
     taxes payable with respect to such tax and/or calendar year(s). In
     addition, after Closing and upon issuance of the final bill for calendar
     year 1997, Seller may file an appeal of the assessed value of the Property
     with respect to calendar year 1997 and a request for a corresponding
     reduction in real estate taxes payable with respect to calendar year 1997.
     Purchaser and Seller hereby agree that: (1) Seller may, after Closing, if
     it so elects, initiate and/or continue to pursue and control the real
     estate tax appeal and reduction process with respect to the tax and/or
     calendar year(s) set forth on EXHIBIT U attached hereto and shall have the
     right to engage counsel, consultants, expert witnesses and appraisers as
     Seller shall reasonably determine to be necessary to such appeal and
     Purchaser shall cooperate (and cause its counsel to cooperate) with Seller
     with respect to such process at no cost to Purchaser; and (2) Seller shall
     be responsible for the cost of any counsel, consultant, expert witness or
     appraiser employed by Seller to obtain any reduction of real estate taxes
     for such tax and/or calendar year(s). In the event that any refunds of
     taxes applicable to any period prior to the Closing Date have not been
     received by Seller as of the Closing, Seller shall retain all rights with
     respect to any refund of such taxes, subject to the rights of tenants under
     Leases.

          (viii) Provision of Information for 1998 Real Estate Tax Reassessment.
     Seller, prior to the date hereof, has received requests from the Cook
     County Assessor (the "Assessor") that Seller provide certain information to
     the Assessor to assist the Assessor in its reassessment of the Property for
     real estate taxes payable with respect to 1998 and subsequent years. Such
     requests include a request for the submission of certain information
     including, without limitation, an appraisal of the Property. In response to
     such requests, prior to the date of this Agreement, Seller's counsel,
     Thomas M. Tully & Associates ("Tully"), has submitted certain items and
     filed certain documents, copies of which are attached hereto as EXHIBIT Y.
     Seller and Purchaser shall reasonably cooperate with each other to submit
     any other requested information and appraisals prior to Closing. In
     connection therewith, Purchaser agrees that, upon Closing or sooner
     termination of this Agreement, it shall be responsible for all costs and
     expenses incurred to comply with such requests and, in the event that
     Seller has paid any such amounts prior to Closing or

                                      11
<PAGE>
 
     sooner termination of this Agreement, Purchaser shall promptly remit such
     amounts to Seller (in the event that the Closing occurs, such remittance
     may be accomplished by Seller receiving a credit at Closing from
     Purchaser); provided, however, that in the event that the Closing does not
     occur and Seller elects (as determined in Seller's sole and exclusive
     discretion) to use the appraisals or other information prepared in
     connection with the foregoing, Seller shall be obligated to pay the cost of
     preparation of such information (to be paid by Seller directly to the
     vendor or reimbursed to Purchaser promptly after termination of this
     Agreement). In connection with such submission, Purchaser acknowledges that
     the real estate tax counsel to be used shall be Tully (and, as provided in
     the Service Contract Assignment, Purchaser shall assume all obligations of
     Seller under the Service Contract with Tully). In the event that the
     Closing occurs, Purchaser shall indemnify, defend and hold Seller, EOPMC,
     Equity Group Investments, Inc., and their respective partners,
     shareholders, officers, directors, employees and affiliates harmless of,
     from and against any and all claims, demands, suits causes of action,
     penalties, sanctions, losses, costs and expenses arising out of, in
     connection with or related to the submissions described and provided for
     herein.

          (ix)  Miscellaneous; Survival. For purposes of this Section 4(C), the
     amount of any expense credited by one party to the other shall be deemed an
     expense paid by that party. The terms and provisions of this Section 4(C)
     shall survive the Closing and delivery of the Deed.

     D.   Transaction Costs. Seller shall be responsible for and shall pay (i)
     the cost to prepare Survey, (ii) the State of Illinois, Cook County and
     City of Evanston transfer taxes and/or documentary stamps (the "Transfer
     Taxes") owed in connection with the Deed (and Seller and Purchaser shall
     timely execute and deliver such forms and returns as are necessary in
     connection therewith), and (iii) the base premium for the owner's title
     insurance policy to be issued to Purchaser at Closing (the "Title Policy").
     Purchaser shall be responsible and pay for (1) any premiums for any
     lender's title insurance policy and all costs of any and all endorsements
     to the Title Policy and/or any lender's title insurance policy, and (2) all
     recording charges for recording the Deed. Seller and Purchaser shall each
     pay one-half (1/2) of all escrow fees, whether or not the Closing occurs.
     In addition, Purchaser and Seller shall each be responsible for the fees of
     their respective attorneys.

     E.   Possession. Upon Closing, Seller shall deliver to Purchaser possession
     of the Property, subject only to the Permitted Exceptions.


5.   CASUALTY LOSS AND CONDEMNATION
     ------------------------------

     If, prior to Closing, the Property or any part thereof shall be taken by
eminent domain or condemned, or destroyed or damaged by fire or other casualty,
Seller shall promptly so notify Purchaser. In the event that either: (i) the
reasonable cost to restore the Property due to such damage or destruction is
greater than Five Hundred Thousand Dollars ($500,000) (a "Material Casualty"),
or (ii) any portion of the Property is taken or condemned (a "Material
Condemnation"), then Purchaser shall have the option to terminate this Agreement
by delivery of its written termination notice to Seller within thirty (30) days
of Seller's written notice thereof. If (a) the aforementioned casualty is not a
Material Casualty, (b) the aforementioned taking or condemnation is not a
Material Condemnation, or (c) Purchaser does not elect to terminate this
Agreement pursuant to the provisions of the preceding sentence (time being of
the essence with respect to any such election), then Seller and Purchaser shall
consummate the transaction contemplated by this Agreement without abatement of
the Purchase Price and Purchaser shall

                                      12
<PAGE>
 
be entitled during the period following the Inspection Period and prior to
Closing to approve the terms of any property insurance settlement, such approval
not to be unreasonably withheld or delayed, and to receive at Closing the
taking, condemnation or property insurance proceeds (or an assignment of the
right to such proceeds) (less any amounts applied against insured costs incurred
or insured income lost by Seller as a result of such occurrence) plus a credit
against the Purchase Price in the amount of any uninsured loss (as to property
only) and any deductible payable by Seller under applicable property insurance,
and Seller shall, at Closing, execute and deliver to Purchaser all customary
proofs of loss, assignments of claims and other similar items. If Purchaser
elects to terminate this Agreement pursuant to the provisions of this Section 5
and Purchaser is not in default under this Agreement, the Earnest Money shall be
returned to Purchaser by the Escrowee, in which event this Agreement shall,
without further action of the parties, become null and void and neither party
shall have any further rights or obligations under this Agreement except those
rights and obligations which expressly survive termination of this Agreement as
provided herein and Seller's rights under the Confidentiality Agreement (as
defined in Section 8(A) below).

6.   BROKERAGE
     ---------

     Seller, pursuant to a separate written agreement (the "Broker Agreement"),
is obligated to pay upon Closing (but not otherwise) a brokerage commission to
CB Commercial Real Estate Group, Inc. ("Broker") for services rendered in
connection with the sale and purchase of the Property. Seller shall indemnify
and hold Purchaser harmless from and against any and all claims of Broker
related to Seller's agreement under the Broker Agreement to pay Broker a
commission in connection with the purchase and sale of the Property, including,
without limitation, reasonable attorneys' fees and expenses incurred by
Purchaser in connection with such claim. Purchaser represents and warrants to
Seller that Purchaser does not have any agreement with any broker or finder in
connection with the Property. Seller and Purchaser shall each indemnify and hold
the other harmless from and against any and all claims of all brokers and
finders (other than a claim by Broker against Seller of the type described in
the first sentence of this Section 6, which claim Seller shall be obligated to
indemnify Purchaser against in accordance with the preceding sentence) claiming
by, through or under the indemnifying party and in any way related to the sale
and purchase of the Property, this Agreement or otherwise, including, without
limitation, reasonable attorneys' fees and expenses incurred by the indemnified
party in connection with such claim. The provisions of this Section 6 shall
survive the Closing and delivery of the Deed or sooner termination of this
Agreement.

7.   DEFAULT AND REMEDIES
     --------------------

     A.   Seller Default.
          -------------- 

          (i)  Notwithstanding anything to the contrary contained in this
     Agreement, if (1) Seller fails to perform in accordance with the terms of
     this Agreement in any material respect, (2) Purchaser is not otherwise in
     material default hereunder, and (3) the Closing does not occur, then, as
     Purchaser's sole and exclusive remedy hereunder and at Purchaser's option,
     either (x) the Earnest Money shall be returned to Purchaser, in which event
     this Agreement shall be null and void, and neither party shall have any
     rights or obligations under this Agreement except as provided in Section
     7(A)(ii) below, or (y) upon notice to Seller not less than fifteen (15)
     days thereafter, and provided an action is filed within thirty (30) days
     thereafter, Purchaser may seek specific performance of this Agreement, but
     not damages. Purchaser's failure to seek specific performance as aforesaid
     shall constitute its election to proceed under clause (x) above.

          (ii) In the event that Seller has, prior to Closing, sold, conveyed or
     encumbered the Property in violation of this Agreement and this Agreement
     has not theretofore been terminated

                                      13
<PAGE>
 
     in accordance with any provision of this Agreement and, as a result of such
     sale and conveyance, it is not possible that specific performance can
     occur, or in the event of an intentional, willful and bad faith material
     breach by Seller of the terms of this Agreement that is not cured within
     ten (10) days after written notice of such breach by Purchaser to Seller,
     and Purchaser is not otherwise in material default hereunder, Purchaser
     shall be entitled to terminate this Agreement and pursue a claim against
     Seller due to Seller's failure to perform in accordance with the terms of
     this Agreement as a result of such breach, such claim for damages to be for
     reimbursement of an amount equal to the lesser of (1) Purchaser's actual,
     out-of-pocket expenses incurred in connection with its proposed purchase of
     the Property as contemplated in this Agreement, and (2) Twenty Five
     Thousand Dollars ($25,000). In addition, in the event that Purchaser files
     suit to pursue such claim and Purchaser is the prevailing party after
     issuance of a final, non-appealable order of a court of competent
     jurisdiction, Purchaser shall be entitled to recover its reasonable costs
     and expenses incurred by Purchaser to file such suit.

     B.   Purchaser Default. If (i) Purchaser fails to perform in accordance
     with the terms of this Agreement in any material respect, (ii) Seller is
     not in material default hereunder, and (iii) the Closing does not occur,
     the Earnest Money shall be retained by Seller as liquidated and agreed upon
     damages and as Seller's sole and exclusive remedy with respect thereto
     other than those rights that survive a termination of this Agreement as
     provided herein and Seller's rights under the Confidentiality Agreement.
     PURCHASER AND SELLER ACKNOWLEDGE AND AGREE THAT (1) THE EARNEST MONEY IS A
     REASONABLE ESTIMATE OF AND BEARS A REASONABLE RELATIONSHIP TO THE DAMAGES
     THAT WOULD BE SUFFERED AND COSTS INCURRED BY SELLER AS A RESULT OF HAVING
     WITHDRAWN THE PROPERTY FROM SALE AND THE FAILURE OF CLOSING TO OCCUR DUE TO
     A DEFAULT OF PURCHASER UNDER THIS AGREEMENT; (2) THE ACTUAL DAMAGES
     SUFFERED AND COSTS INCURRED BY SELLER AS A RESULT OF SUCH WITHDRAWAL AND
     FAILURE TO CLOSE DUE TO A DEFAULT OF PURCHASER UNDER THIS AGREEMENT WOULD
     BE EXTREMELY DIFFICULT AND IMPRACTICAL TO DETERMINE; (3) PURCHASER SEEKS TO
     LIMIT ITS LIABILITY UNDER THIS AGREEMENT TO THE AMOUNT OF THE EARNEST MONEY
     IN THE EVENT THIS AGREEMENT IS TERMINATED AND THE TRANSACTION CONTEMPLATED
     BY THIS AGREEMENT DOES NOT CLOSE DUE TO A DEFAULT OF PURCHASER UNDER THIS
     AGREEMENT; AND (4) THE EARNEST MONEY SHALL BE AND CONSTITUTE VALID
     LIQUIDATED DAMAGES.


     PURCHASER INITIALS:                                     SELLER INITIALS:


 
     ___________________                                     ___________________


     C.   Post-Closing Remedies. After Closing, Seller and Purchaser shall,
     subject to the terms and conditions of this Agreement (including, without
     limitation, Section 10(P) below), have such rights and remedies as are
     available at law or in equity. The provisions of this Section 7 shall
     survive the Closing and delivery of the Deed or sooner termination of this
     Agreement.

8.   CONDITIONS PRECEDENT
     --------------------

     A.   Inspection Period. There presently exists that certain confidentiality
     agreement dated December 23, 1997, from Broker on behalf of EOPMC and
     Seller, on the one hand, and Prentiss

                                      14
<PAGE>
 
     Properties, Ltd. (for itself and as agent for Purchaser), on the other, as
     modified by that certain modification amendment dated May 4, 1998 and
     accepted by Purchaser on May 6, 1998 (collectively, the "Confidentiality
     Agreement"), a copy of which is attached hereto as EXHIBIT Q. Subject to
     Section 10(G) below and the provisions of the Confidentiality Agreement,
     Purchaser and/or its agents have had, the period between May 6, 1998 and
     the date of this Agreement within which to inspect the Property and conduct
     such non-invasive, non-intrusive tests, surveys and inspections as
     Purchaser deemed reasonably necessary or appropriate (the "Inspection
     Period"). During the period between the date of this Agreement and Closing,
     Purchaser shall have the right to continue to inspect and enter the
     Property, subject to Section 10(G) below and the provisions of the
     Confidentiality Agreement. Purchaser, by its execution of this Agreement,
     acknowledges that it had an opportunity during the Inspection Period to
     inspect the Property and all Disclosures (as defined in Section 10(H)
     below) and make such other inquiries and investigations and obtain such
     reports and analyses it deemed adequate in connection with its decision to
     purchase the Property, and, as a result thereof, Purchaser shall agrees
     that, except as specifically set forth in this Agreement, it shall purchase
     the Property in its "AS IS, WHERE IS" condition, subject to ordinary wear
     and tear and as more particularly provided in Section 10(H) below.

     B.   Estoppel Certificates.
          --------------------- 

          (i)  It shall be a condition precedent to Purchaser's obligation to
     close the purchase and sale transaction contemplated in this Agreement that
     Purchaser shall have received, at Closing, estoppel certificates
     (individually, an "Estoppel Certificate" and collectively, the "Estoppel
     Certificates") dated as of a date no more than forty-five (45) days prior
     to Closing, from tenants occupying not less than eighty percent (80%) of
     the net rentable square footage of space at the Property actually leased as
     of the end of the Inspection Period pursuant to valid and existing Leases,
     specifically including in such eighty percent (80%) Estoppel Certificates
     executed by ZS Associates, Inc., Sachs Group, Inc., and Cass
     Communications, Inc., such Estoppel Certificate to be in form and content
     as set forth herein. The Estoppel Certificates executed by tenants shall be
     substantially in the form of EXHIBIT G attached hereto (the "Form Tenant
     Estoppel Certificate") and must not disclose any matters that make the
     representatives of Seller in Section 9(A) untrue or incorrect in any
     material respect as of the effective date of such representations or as of
     the Closing Date or disclose a Tenant Inducement Obligation (as hereinafter
     defined) (each an "Estoppel Matter" and collectively "Estoppel Matters"),
     except that an Estoppel Certificate shall be deemed an acceptable Estoppel
     Certificate for purposes of this Section 8(B)(i) if: (1) it contains the
     qualification by the tenant of any statement as being to the best of its
     knowledge or as being subject to any similar qualification in the places
     where the phrase "to Tenant's knowledge" is in bold and bracketed on the
     attached EXHIBIT G, and/or (2) it contains any tenant objection to
     addressing or certifying the Estoppel Certificate to Purchaser's mortgage
     lender, if any and the Lease does not obligate the tenant to so certify to
     such mortgage lender, or is not addressed or certified to such mortgage
     lender and the Lease does not obligate the tenant to so certify to such
     mortgage lender, (3) it is in a form required by the applicable Tenant's
     Lease (the aforesaid acceptable Estoppel Certificates to be delivered are
     collectively referred to as the "Required Estoppel Certificates"), and/or
     (4) if it does not contain the base year or base year amount in item 8 of
     EXHIBIT G. In the event that an Estoppel Certificate discloses any Estoppel
     Matters, Seller shall have the right, but not the obligation to cure the
     Estoppel Matter and, in such event, extend the scheduled date for Closing
     hereunder for up to thirty (30) days to complete such cure. As used herein,
     the term "Tenant Inducement Obligation" shall mean any tenant improvement
     obligation or allowance, any rent abatement or other obligation of the
     landlord of a similar nature under the Leases that is to be given and/or
     fulfilled after Closing and such obligation: (w) was

                                      15
<PAGE>
 
     not set forth in the Leases as being required to be performed after
     Closing, (x) the Service Contracts, (y) EXHIBIT S, or (z) EXHIBIT T.

          (ii)   In the event that Seller is unable to provide to Purchaser the
     Required Estoppel Certificates at Closing as provided above, Purchaser may
     either: (y) elect not to purchase the Property, in which event this
     Agreement shall be null and void, the Escrowee shall promptly return the
     Earnest Money to Purchaser and thereafter neither Seller nor Purchaser
     shall have any further rights or obligations under this Agreement, other
     than those rights and obligations which expressly survive termination of
     this Agreement and the rights and obligations under the Confidentiality
     Agreement; or (z) elect to purchase the Property notwithstanding Seller's
     inability to provide the Required Estoppel Certificates, in which event
     Seller shall not be obligated to provide any additional Estoppel
     Certificates to Purchaser after Closing. The provisions of this Section
     8(B)(ii) shall survive the Closing and delivery of the Deed.

          (iii)  If any Estoppel Certificates contain statements or allegations
     that a default or potential default exists on the part of Seller under the
     Lease in question and (1) the existence or the substance of such
     allegations or statements were contained in any written documentation
     provided to any of the Purchaser Knowledge Parties (as hereinafter defined)
     prior to the end of the Inspection Period, or (2) prior to the end of the
     Inspection Period any of the Purchaser Knowledge Parties otherwise obtained
     actual knowledge of facts revealing the substance of such statements or
     allegations, or (3) Purchaser elects that Closing occur notwithstanding the
     existence of such default or potential default, then such Estoppel
     Certificates shall be deemed acceptable for purposes of this Section 8(B),
     notwithstanding the existence of such allegations or statements and Seller
     shall have no liability to Purchaser hereunder with respect to the
     existence of such allegations, statements or information. The provisions of
     this Section 8(B)(iii) shall survive the Closing and delivery of the Deed.
     As used herein, "Purchaser Knowledge Parties" shall mean Tim Telling,
     Lawrence Krueger and Kevin Carroll.

     C.   Accuracy of Seller's Representations. It shall be a condition
     precedent to Purchaser's obligation to close the purchase and sale
     transaction contemplated in this Agreement that each of Seller's
     representations set forth in Section 9(A) below shall be true and correct
     in all material respects as of Closing, as modified by any Inspection
     Period Disclosures (as defined in Section 9(B) below) prior to the end of
     the Inspection Period. In the event that Seller makes any Pre-Closing
     Disclosures (as defined in Section 9(B) below) to Purchaser or if the
     Closing Certification contains items making Seller's representations in
     Section 9(A) untrue or incorrect in any material respect as of the Closing
     Date and such items are not Inspection Period Disclosures, Purchaser shall
     have the right to terminate this Agreement and receive the return of the
     Earnest Money by delivering written notice thereof to Seller on or before
     Closing. If Purchaser does not terminate this Agreement pursuant to its
     rights under this Section 8(C), then such representations shall be deemed
     modified to conform them to the Inspection Period Disclosures and the Pre-
     Closing Disclosures. The provisions of this Section 8(C) shall survive the
     Closing and delivery of the Deed or sooner termination of this Agreement.

     D.   Compliance by Seller. It shall be a condition precedent to Purchaser's
     obligation to close the purchase and sale transaction contemplated in this
     Agreement that Seller shall have materially performed each of its
     obligations hereunder.

     E.   Compliance by Purchaser. It shall be a condition precedent to Seller's
     obligation to close the purchase and sale transaction contemplated in this
     Agreement that Purchaser shall have materially performed each of its
     obligations hereunder.

                                      16
<PAGE>
 
     F.   Board Approval. It shall be a condition precedent to Purchaser's
     obligation to close the purchase and sale transaction contemplated in this
     Agreement that the Investment Committee of Purchaser approve the
     transactions contemplated herein on or before 2:00 p.m. (Chicago, Illinois
     time) on the third (3rd) business day after the date of this Agreement. In
     the event that Seller does not receive written notice from Purchaser of the
     Board of Trustees' failure to approve the transactions, the condition
     precedent set forth in this Section 8(F) shall be deemed waived. In the
     event that Seller receives written notice from Purchaser of the Board of
     Trustees' failure to approve the transactions on or before 2:00 p.m.
     (Chicago, Illinois time) on the third (3rd) business day after the date of
     this Agreement, this Agreement shall be null and void and neither party
     shall have any further rights or obligations under this Agreement except
     those that expressly survive a termination of this Agreement as provided
     herein and Seller's rights under the Confidentiality Agreement.

9.   SELLER'S REPRESENTATIONS
     ------------------------

     A.   Representations. Seller represents to Purchaser that, as of the date
     of this Agreement (or such other date, as applicable):

          (i)    Organization; Authority. Seller is a general partnership, duly
     organized and in good standing under the laws of the State of Illinois.
     Seller has the power and authority under Seller's partnership agreement
     ("Seller's Organizational Documents") to sell, transfer, convey and deliver
     the Property to be sold and purchased hereunder, and all action and
     approvals required thereunder have been duly taken and obtained in order to
     sell, transfer, convey and deliver the Property as aforesaid.

          (ii)   No Breach. The execution and delivery of this Agreement, the
     consummation of the transactions contemplated herein and fulfillment of the
     terms hereof will not result in a breach of any of the terms or provisions
     of, or constitute a default under, any provision of Seller's Organizational
     Documents.

          (iii)  Condemnation. As of June 26, 1998, Seller has not received from
     any governmental authority any written notice of any pending condemnation
     or taking by eminent domain of the Property or any portion thereof.

          (iv)   Litigation. Except as set forth on EXHIBIT H attached hereto,
     as of June 26, 1998, Seller is neither a party to any existing litigation
     with respect to the Property nor has it received formal written process of
     any litigation with respect to the Property which is still pending.

          (v)    Rent Roll. Attached hereto as EXHIBIT N is a list (the "Rent
     Roll") setting forth the following information as of the date of this
     Agreement: (1) the name, to the Actual Knowledge of Seller, of each tenant
     under each of the Leases as of the date of this Agreement, (2) the Suite
     number(s) occupied (or to be occupied, with respect to those tenants who
     have not yet taken possession of the space demised under their Lease) by
     each such tenant, (3) the monthly Base Rent and estimated operating expense
     pass-throughs payable by each tenant with respect to the month of June,
     1998, (4) to the Actual Knowledge of Seller, the approximate square footage
     demised under the particular tenant's Lease, (5) the amount of all
     unapplied Security Deposits held by Seller with respect to the Leases as of
     the date hereof, (6) the expiration dates of the current Lease terms, (7)
     the monthly storage rent payable by each tenant with respect to June, 1998,
     the (8) "base year" used to calculate Tenant Reimbursements payable by the
     tenant, and (9) any delinquent rent or other amounts owed by tenants as of
     June 15, 1998.

                                      17
<PAGE>
 
          (vi)   Leases. Prior to the date hereof, Seller has delivered true and
     correct (to the Actual Knowledge of Seller) copies of the Leases to
     Purchaser.

          (vii)  Violations of Law. To the Actual Knowledge of Seller, as of
     June 26, 1998, except as set forth on Exhibit I attached hereto, Seller has
     received no written notice from any governmental authority of any material
     violation of any, state or federal law, rule or regulation concerning the
     Property or any part thereof which has not been cured prior to the date of
     this Agreement.

          (viii) Service Contracts. To the Actual Knowledge of Seller, the list
     attached hereto as Exhibit C lists all of the Service Contracts, the vendor
     and/or payor under each Service Contract, a description of the service
     provided thereunder and, if such Service Contract is written, the date of
     the Service Contract. Prior to the date hereof, Seller has delivered true
     and correct (to the Actual Knowledge of Seller) copies of the Service
     Contracts to Purchaser.

          (ix)   Employees. Seller has no employees working at the Property.

          (x)    Personal Property. Seller owns all of the Tangible Personal
     Property.

          (xi)   Union Contracts. Except for the Union Contract, the New Global
     Union Contract and/or the new union contract, as applicable, the Property
     is not subject to any union or collective bargaining agreements that will
     be enforceable against the Property or any owner thereof after Closing.

          (xii)  Lease Defaults. Except as set forth on EXHIBIT W attached
     hereto, as of June 26, 1998, Seller has received no written notice of a
     material default of Seller under any of the Leases which has not been cured
     prior to the date of this Agreement.

          When used in this Agreement, the term "Actual Knowledge of Seller"
     shall mean and be limited to the actual (and not imputed, implied or
     constructive) current actual knowledge of Alissa Schneider, Vice President-
     Dispositions of Equity Office Properties Trust, a Maryland real estate
     investment trust ("EOP") and Arvid Povilatis, Senior Vice President of EOP.
     Notwithstanding anything herein to the contrary, neither Alissa Schneider
     nor Arvid Povalitis shall (whether prior to or after Closing) have any
     personal liability or obligation whatsoever with respect to any matters set
     forth in this Agreement or with respect to any of Seller's representations
     herein being or becoming untrue, inaccurate or incomplete in any respect.
     Any knowledge or notice given to any of Seller's other agents, servants,
     representatives or employees shall not be imputed to Seller.

     B.   Representations Remade. At Closing, Seller shall be deemed to remake
     and restate the representations set forth in Section 9(A) and as set forth
     in the Closing Certification except that the representations shall be
     updated: (i) by Seller delivering written notice to the Purchaser Knowledge
     Parties prior to Closing to reflect any fact, matter or circumstance which
     Seller's Chicago, Illinois representatives become aware of that would make
     any of Seller's representations contained in Section 9(A) untrue or
     incorrect in any material respect, (ii) to reflect any written information
     provided to the Purchaser Knowledge Parties prior to the expiration of the
     Inspection Period, (iii) to reflect any statements or allegations in
     Estoppel Certificates that a default or potential default exists on the
     part of Seller under the respective Leases in question not previously
     disclosed to Purchaser that would otherwise make any of Seller's
     representations in Section 9(A) or the Closing Certification untrue in any
     material

                                      18
<PAGE>
 
     respect, and (iv) to reflect the actual knowledge of any of the Purchaser
     Knowledge Parties, prior to the end of the Inspection Period, of facts
     inconsistent with or different from the representations set forth herein
     (items (i) and (iii) being collectively referred to herein as the "Pre-
     Closing Disclosures" and items (ii) and (iv) being collectively referred to
     herein as the "Inspection Period Disclosures").

     C.   Survival. The representations of Seller set forth in Section 9(A),
     subject to modifications thereto as provided in Section 9(B), shall survive
     the Closing and the delivery of the Deed for a period terminating on the
     two hundred seventieth day (270th) after the Closing Date. In addition, the
     certification of Seller set forth in the Updated Rent Roll shall, subject
     to Section 8(B) above, survive the Closing and delivery of the Deed for a
     period terminating on the two hundred seventieth day (270th) after the
     Closing Date. Notice of any claim as to a breach of any such
     representations must be made to Seller prior to 5:00 p.m. (Chicago,
     Illinois time) on the two hundred seventieth day (270th) after the Closing
     Date or it shall be deemed a waiver of the right to assert such claim.

     D.   Defaults by tenants under Leases and vendors under Service Contracts.
     Seller does not represent that any particular Service Contract will be in
     force or effect as of the Closing or that tenants under Leases or the
     parties to the Service Contracts will not be in default under their
     respective Leases or Service Contracts, and neither the existence of any
     default by any tenant under its Lease nor the default of any party under
     any Service Contract shall affect the obligations of Purchaser hereunder;
     provided, however, the foregoing shall not affect the conditions contained
     in Sections 8(B) or 8(C) above. The provisions of this Section 9(D) shall
     survive the Closing and delivery of the Deed.

     E.   Estoppel Certificates supersede representations. In the event that an
     Estoppel Certificate is received from a tenant (before or after Closing)
     which confirms the accuracy of the representations made in Section 9(A) (as
     modified as provided in Section 9(B)) or the certification set forth in the
     Updated Rent Roll, then the representations in Section 9(A) and the
     certification in the Updated Rent Roll with respect to the corresponding
     Lease (as modified as provided in Section 9(B)) shall be deemed to be
     superseded by such Estoppel Certificate (and, in such event, Seller shall
     no longer have any liability hereunder with respect to the portion of the
     representation superseded). The provisions of this Section 9(E) shall
     survive the Closing and delivery of the Deed.

10.  MISCELLANEOUS
     -------------

     A.   Entire Agreement. All understandings and agreements heretofore had
     between Seller and Purchaser with respect to the Property are merged in
     this Agreement, which alone fully and completely expresses the agreement of
     the parties. Purchaser further acknowledges that, except as expressly
     provided in this Agreement or in any documents executed in connection with
     the Closing (the "Closing Documents"), neither Seller nor any agent or
     representative of Seller has made, and Seller is not liable for or bound in
     any manner by, any express or implied warranties, guaranties, promises,
     statements, inducements, representations or information pertaining to the
     Property. The provisions of this Section 10(A) shall survive the Closing
     and delivery of the Deed.

     B.   No Assignment. Except for an assignment to a Permitted Assignee (as
     hereinafter defined) or as permitted under Section 10(AA) below, neither
     this Agreement nor any interest hereunder shall be assigned or transferred
     by Purchaser without the written consent of Seller, which consent may be
     withheld in the sole and absolute discretion of Seller. For purposes of
     this

                                      19
<PAGE>
 
     Agreement, the term "Permitted Assignee" shall be defined to mean a
     partnership, corporation or limited liability company owned or controlled
     by Purchaser. Upon an assignment to a Permitted Assignee such Permitted
     Assignee shall execute and deliver an agreement to Seller in which such
     Permitted Assignee assumes all of the obligations of Purchaser under this
     Agreement. Upon an assignment of this Agreement to a Permitted Assignee:
     (1) Purchaser shall not be relieved of any subsequently accruing liability
     under this Agreement, and (2) as used in this Agreement, the "Purchaser"
     shall be deemed to include such Permitted Assignee. Any time after the two
     hundred seventieth (270th) day after the Closing Date, Seller may assign or
     otherwise transfer its interest under this Agreement. As used in this
     Agreement, the term "Seller" shall be deemed to include any assignee or
     other transferee of any Seller. Upon any such transfer by a Seller, such
     Seller shall be relieved of any subsequently accruing liability under this
     Agreement. Subject to the foregoing, this Agreement shall inure to the
     benefit of and shall be binding upon Seller and Purchaser and their
     respective successors and assigns. The provisions of this Section 10(B)
     shall survive the Closing and delivery of the Deed or sooner termination of
     this Agreement.

     C.   Amendments. This Agreement shall not be modified or amended except in
     a written document signed by Seller and Purchaser.

     D.   Time of the Essence.  Time is of the essence of this Agreement.

     E.   Governing Law. This Agreement shall be governed and interpreted in
     accordance with the laws of the State of Illinois. The provisions of this
     Section 10(E) shall survive the Closing and delivery of the Deed or sooner
     termination of this Agreement.

     F.   Notices. All notices, requests, demands or other communications
     required or permitted under this Agreement shall be in writing and
     delivered (i) personally, (ii) by certified mail, return receipt requested,
     postage prepaid, (iii) by overnight courier (such as Federal Express), or
     (iv) by facsimile transmission (with a copy sent via (i), (ii) or (iii)),
     addressed as follows):

               1.   If to Seller:

                    c/o Equity Office Properties Management Corp.
                    Two North Riverside Plaza
                    Suite 2200
                    Chicago, Illinois 60606
                    Telephone: (312) 466-3595
                    Facsimile: (312) 559-5051

                    Attention: Alissa Schneider

                                      20
<PAGE>
 
                    With a copy to:

                    Rosenberg & Liebentritt, P.C.
                    Suite 1600
                    Two North Riverside Plaza
                    Chicago, Illinois 60606
                    Telephone: (312) 466-3483
                    Facsimile: (312) 454-0335

                    Attention: Steven E. Ehrlich


               2.   If to Purchaser:

                    Prentiss Properties Acquisition Partners, L.P.
                    9950 West Lawrence Avenue
                    Suite 105
                    Schiller Park, Illinois 60176
                    Telephone: (847) 678-7966
                    Facsimile: (847) 678-8032

                    Attention: Lawrence J. Krueger



                    With a copy to:

                    Rudnick & Wolfe
                    203 North LaSalle Street
                    Chicago, Illinois 60601
                    Telephone: (312) 368-2178
                    Facsimile: (312) 236-7516

                    Attention: Peter Ross


     All notices given in accordance with the terms hereof shall be deemed
     received (1) when delivered, if personally delivered, (2) forty-eight (48)
     hours after posting, if sent by certified mail, return receipt requested,
     postage prepaid, (3) the next business day after deposit with the courier
     company, if sent by overnight courier, and (4) on the day sent, if sent by
     facsimile transmission prior to the close of the recipient's business day.
     Either party hereto may change the address for receiving notices, requests,
     demands or other communication by notice sent in accordance with the terms
     of this Section 10(F).

     G.   Inspections. Purchaser's right of inspection pursuant to Section 8(A)
     above shall be subject to the rights of tenants under the Leases and other
     occupants and users of the Property. No inspection shall be undertaken
     without reasonable prior notice to Seller. Seller shall have the right to
     be present at any or all inspections. Purchaser may contact tenants
     directly; provided that Purchaser shall notify Seller forty-eight (48)
     hours prior to any such contact so that Seller may have a representative
     present during such contact. No inspection shall involve the taking of
     samples or other physically invasive procedures without the prior consent
     of Seller. Notwithstanding anything to the contrary contained in this
     Agreement, Purchaser shall



                                      21

<PAGE>
 
indemnify and hold Seller and its employees and agents, and each of them,
harmless from and against any and all losses, claims, damages and liabilities
(including, without limitation, reasonable attorneys' fees incurred in
connection therewith) arising out of or resulting from Purchaser's exercise of
its rights of inspection as provided for in Section 8(A) above and this Section
10(G). Except upon the written request of Seller pursuant to Section 10(K)
below, Purchaser shall not deliver to Seller copies of any of the studies,
reports, surveys or other information, data and/or documents relating to the
Property or any part thereof prepared by or at the request of Purchaser, its
employees, agents, representatives or contractors. The provisions of this
Section 10(G) shall survive the Closing and delivery of the Deed or sooner
termination of this Agreement.

H.  As-Is Condition.  ACKNOWLEDGING THE PRIOR USE OF THE PROPERTY AND
PURCHASER'S OPPORTUNITY TO INSPECT THE PROPERTY AND EXCEPT AS SPECIFICALLY
PROVIDED IN THIS AGREEMENT, PURCHASER AGREES TO TAKE THE PROPERTY "AS IS" WITH
ALL FAULTS AND CONDITIONS THEREON, SUBJECT TO USE, ORDINARY WEAR AND TEAR,
NATURAL DETERIORATION AND SUCH OTHER MATTERS AS ARE PERMITTED BY THIS AGREEMENT.
EXCEPT AS SPECIFICALLY PROVIDED IN THIS AGREEMENT OR THE CLOSING DOCUMENTS, ANY
INFORMATION, REPORTS, STATEMENTS, DOCUMENTS OR RECORDS, INCLUDING, WITHOUT
LIMITATION, THE ITEMS SET FORTH IN EXHIBIT P ATTACHED HERETO (COLLECTIVELY, THE
"DISCLOSURES") PROVIDED OR MADE TO PURCHASER OR ITS CONSTITUENTS OR AGENTS BY
SELLER, ITS AGENTS, EMPLOYEES, CONTRACTORS OR REPRESENTATIVES, CONCERNING THE
PROPERTY SHALL NOT BE REPRESENTATION OR WARRANTIES. EXCEPT AS SPECIFICALLY
PROVIDED IN THIS AGREEMENT OR IN ANY CLOSING DOCUMENTS, PURCHASER SHALL NOT RELY
ON SUCH DISCLOSURES, BUT RATHER, PURCHASER SHALL RELY ONLY ON ITS OWN INSPECTION
OF THE PROPERTY. PURCHASER ACKNOWLEDGES AND AGREES THAT, EXCEPT AS EXPRESSLY
PROVIDED IN THIS AGREEMENT OR IN ANY CLOSING DOCUMENTS, NEITHER SELLER NOR ITS
AGENTS, EMPLOYEES, CONTRACTORS OR REPRESENTATIVE HAS MADE, AND NONE OF THEM
MAKES AND EACH SPECIFICALLY DISCLAIMS ANY STATEMENTS, REPRESENTATIONS,
WARRANTIES, PROMISES, COVENANTS, AGREEMENTS OR GUARANTIES OF ANY KIND OR
CHARACTER WHATSOEVER, WHETHER EXPRESS OR IMPLIED, ORAL OR WRITTEN, PAST, PRESENT
OR FUTURE, OF, AS TO, CONCERNING OR WITH RESPECT TO (A) THE NATURE, QUALITY OR
CONDITION OF THE PROPERTY, INCLUDING, WITHOUT LIMITATION, THE WATER, SOIL AND
GEOLOGY, (B) THE INCOME HERETOFORE DERIVED OR TO BE DERIVED FROM THE PROPERTY,
(C) THE SUITABILITY OF THE PROPERTY FOR ANY AND ALL ACTIVITIES AND USES WHICH
PURCHASER MAY CONDUCT THEREON, (D) THE COMPLIANCE OF OR BY THE PROPERTY OR ITS
OPERATION WITH ANY LAWS, RULES, ORDINANCES OR REGULATIONS OF ANY APPLICABLE
GOVERNMENTAL AUTHORITY OR BODY, (E) THE HABITABILITY, MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE OF THE PROPERTY, OR (F) ANY OTHER MATTER WITH RESPECT
TO THE PROPERTY, AND SPECIFICALLY DISCLAIM ANY REPRESENTATIONS REGARDING
TERMITES OR WASTES, AS DEFINED BY THE U.S. ENVIRONMENTAL PROTECTION AGENCY
REGULATIONS AT 40 C.F.R., OR ANY HAZARDOUS SUBSTANCE, AS DEFINED BY THE
COMPREHENSIVE ENVIRONMENTAL RESPONSE COMPENSATION AND LIABILITY ACT OF 1980
("CERCLA"), AS AMENDED, AND REGULATIONS PROMULGATED THEREUNDER.

                                      22
<PAGE>
 
     PURCHASER, ITS SUCCESSORS AND ASSIGNS, HEREBY WAIVE, RELEASE AND AGREE NOT
TO MAKE ANY CLAIM OR BRING ANY COST RECOVERY ACTION OR CLAIM OR CONTRIBUTION,
INDEMNITY OR OTHER ACTION OR CLAIM AGAINST SELLER OR ITS AFFILIATES, DIRECTORS,
OFFICERS, EMPLOYEES, AGENTS, ATTORNEYS OR ASSIGNS (A) UNDER ANY FEDERAL, STATE
OR LOCAL ENVIRONMENTAL OR HEALTH AND SAFETY LAW OR REGULATION, INCLUDING CERCLA
OR ANY STATE EQUIVALENT, OR ANY SIMILAR LAW NOW EXISTING OR HEREAFTER ENACTED;
(B) WITH RESPECT TO, IN CONNECTION WITH OR RESULTING FROM ANY DISCHARGE,
DISPOSAL, RELEASE OR ESCAPE OF ANY CHEMICAL, OR ANY HAZARDOUS OR TOXIC MATERIAL
WHATSOEVER, ON, AT, TO OR FROM THE PROPERTY; OR (C) ANY ENVIRONMENTAL CONDITIONS
OR OTHER CONDITIONS WHATSOEVER ON, UNDER OR IN THE VICINITY OF THE PROPERTY.

     THE PROVISIONS OF THIS SECTION 10(H) SHALL SURVIVE THE CLOSING AND DELIVERY
OF THE DEED OR SOONER TERMINATION OF THIS AGREEMENT.

I.   Waiver of Jury Trial.  In any lawsuit or other proceeding under or with
respect to this Agreement, Purchaser and Seller waive any rights they may have
to trial by jury. The provisions of this Section 10(I) shall survive the Closing
and delivery of the Deed or sooner termination of this Agreement.

J.   Confidentiality; Press Release.  Purchaser acknowledges that all
information with respect to the Property obtained or developed by Purchaser, or
furnished or to be furnished to Purchaser is, has been and will be so furnished
on the condition that Purchaser maintain the confidentiality thereof.
Accordingly, prior to Closing, Purchaser shall, and shall cause its directors,
officers and other personnel and representatives to, hold in strict confidence,
and not disclose to any other party without the prior written consent of Seller:
(i) any of the information with respect to the Property delivered to Purchaser
by Seller or any of its agents, representatives or employees, or (ii) the
existence of this Agreement or any term or condition hereof, or (iii) the
results of any inspections or studies undertaken in connection herewith or any
other information obtained or developed by Purchaser. In addition, prior to
Closing, neither Purchaser nor Purchaser's directors, officers and other
personnel and representatives shall solicit offers to purchase the Property to
any other party without the prior written consent of Seller. Notwithstanding the
above, Purchaser may disclose such information to individuals or entities
necessary for Purchaser to consummate the transaction contemplated herein (such
as investors, lenders, engineers, attorneys, prospective management companies,
environmental consultants, accountants and tax advisors and Focus Development
[as to matters pertinent to a sale of a portion of the Property to Focus
Development after Closing]) and as required by law. Purchaser shall, with
respect to any parties to whom the existence of this Agreement or any
information with respect to the Property is disclosed, notify such parties of
the existence of the Confidentiality Agreement and its applicability to any such
information provided to any such parties. In the event the Closing does not
occur and this Agreement is terminated, Purchaser shall, upon written request by
Seller, promptly return to Seller all copies of all such information without
retaining any copy thereof or extract therefrom. In the event that the Closing
occurs, both Seller and Purchaser shall only issue press releases with respect
to the transaction in forms reasonably acceptable to both parties. Purchaser's
and Seller's obligations under this Section 10(J) shall survive any termination
of this Agreement. Purchaser's obligations under this

                                      23

<PAGE>
 
Section 10(J) shall terminate and be of no further force and effect if the
Closing occurs hereunder.

K.   Reports.  If for any reason Purchaser does not consummate the Closing, then
Purchaser shall, upon Seller's written request, assign and transfer to Seller,
without representation, warranty or recourse, all of its right, title and
interest in and to any and all third-party studies, reports, surveys and other
information, data and/or documents relating to the Property or any part thereof
prepared by or at the request of Purchaser, its employees and agents, and shall
deliver to Seller copies of all of the foregoing. The provisions of this Section
10(K) shall survive any termination of this Agreement.

L.   New Leases.  Seller and Purchaser further agree as follows:
     ----------                                                 

          1.  From and after the date of this Agreement through the Closing,
     Seller has delivered or shall deliver, as applicable, to Purchaser for
     review (a "New Lease Notice") a copy of any proposed New Lease, together
     with a schedule of any tenant improvement costs and/or allowances and
     leasing commissions payable in connection therewith and, to the extent
     obtained from a prospective new tenant, such tenant's financial
     information. Purchaser shall have the right (exercisable in its reasonable
     discretion) to approve or disapprove of any New Lease by responding in
     writing to Seller's New Lease Notice within five (5) business days after
     Purchaser's receipt of the New Lease Notice. If Purchaser fails to approve
     or disapprove of such New Lease within such five (5) business day period,
     Purchaser shall be deemed to have conclusively approved of such New Lease.
     In the event that Purchaser reasonably disapproves of such New Lease within
     such five (5) business day period, Seller shall not enter into such New
     Lease.

          2.  All tenant improvement costs and/or allowances and leasing
     commissions relating to New Leases entered into by Seller between the date
     of this Agreement and prior to Closing which Purchaser approves (or is
     deemed to approve) in accordance with Section 10(L)(1) above, shall be
     prorated in accordance with Section 4(C)(i)(c) above.

M.   Reporting Person.  Seller and Purchaser hereby designate Escrowee to act as
and perform the duties and obligations of the "reporting person" with respect to
the transaction contemplated by this Agreement for purposes of 26 C.F.R. Section
1.6045-4(e)(5) relating to the requirements for information reporting on real
estate transaction closed on or after January 1, 1991. In this regard, Seller
and Purchaser each agree to execute at Closing, and to cause the Escrowee to
execute at Closing, a Designation Agreement, designating Escrowee as the
reporting person with respect to the transaction contemplated by this Agreement.

N.   Counterparts.  This Agreement may be executed in any number of identical
counterparts, any or all of which may contain signatures of fewer than all of
the parties but all of which taken together shall constitute a single
instrument.

O.   No Recording.  Neither this Agreement nor a memorandum thereof shall be
recorded against the Property.

P.  Limitation of Liability.
    ----------------------- 

                                      24
<PAGE>
 
               1.  Purchaser acknowledges and agrees that any recovery against
          Seller that Purchaser may be entitled to as a result of any claim,
          demand or cause of action that Purchaser may have against Seller with
          respect to this Agreement and the transactions contemplated herein
          shall only be recoverable against Seller in an amount not in excess of
          Five Hundred Thousand ($500,000.00).

               2.  In order to secure the obligations and liabilities of Seller
          under this Agreement that survive Closing, (collectively, "Seller's
          Surviving Obligations"), at Closing, Seller shall deposit Five Hundred
          Thousand Dollars ($500,000.00) of the proceeds of the purchase and
          sale transaction (the "Holdback Funds") with the closing escrowee.
          All interest accrued on the Holdback Funds shall accrue to the benefit
          of and be paid to Seller.  Holdback Funds shall be invested as Seller
          directs.

               3.  If Purchaser incurs any single loss, damage, cost or expense
          (including attorneys' fees) for any matter in excess of Twenty Five
          Thousand Dollars ($25,000.00) or any group of losses, damages, costs
          or expenses (including attorneys' fees) aggregating in excess of
          Twenty Five Thousand Dollars ($25,000.00) Purchaser believes is
          covered under Seller's Surviving Obligations (a "Claim"), and desires
          to seek recovery from Seller, Purchaser shall give Seller written
          notice thereof (a "Claim Notice") describing the Claim in reasonable
          detail.  The Claim Notice shall, if applicable, be accompanied by
          appropriate documentation (including by way of illustration, but not
          of limitation, receipted bills or canceled checks). If the Claim
          Notice states a Claim for a specified amount of money, the Claim
          Notice shall also be accompanied by appropriate documentation thereof
          (including by way of illustration, but not of limitation, estimates by
          independent and reputable vendors, contractors, engineers or
          architects or other responsible estimators unaffiliated with
          Purchaser, third party invoices, receipted bills or canceled checks).

               4.  Seller and Purchaser, acting reasonably and in good faith,
          shall attempt to amicably resolve each Claim within thirty (30) days
          after its Claim Notice becomes effective.  If such amicable resolution
          results in an agreed amount payable to Purchaser, Seller and Purchaser
          shall deliver a joint written instruction to the closing escrowee to
          pay the agreed-upon amount to Purchaser out of the Holdback Funds.  If
          such Claim is not amicably resolved, then Purchaser shall give Seller
          written notice of its election to litigate the Claim at least five (5)
          business days prior to commencing such litigation and, after the
          expiration of such five (5) business day period, may proceed to
          litigate the Claim, and if Purchaser obtains Final Judgment in its
          favor with respect to the Claim, the closing escrowee shall, upon
          receipt of a copy of the Final Judgment certified by the clerk of the
          court issuing such Final Judgment, disburse the appropriate amount out
          of the Holdback Funds.  As used herein, "Final Judgment" means a final
          judgment or verdict rendered by a court of competent jurisdiction,
          after all appeals (or expiration of all appeal periods, if no appeal
          is taken).

               5.  If no Claim is made before the two hundred seventieth (270th)
          day after the Closing Date, then the Holdback Funds may thereafter be
          distributed to Seller.

               6.  If any Claim Notice is given before the two hundred
          seventieth (270th) day after the Closing Date (collectively, "Eligible
          Claim[s]") the closing escrowee shall not distribute an aggregate
          amount of Holdback Funds in the amount of 150% of such Claims (but in
          no event more than $500,000 in the aggregate), and retain such amount
          until such time as (i) Purchaser and Seller jointly agree upon
          disposition of such funds 

                                      25          
<PAGE>
 
          and deliver a joint written direction to the closing escrowee
          instructing the closing escrowee as to the distribution of such funds
          or (ii) a Final Judgment is entered with respect to such funds. Any
          balance may be distributed by Seller as of the two hundred seventieth
          (270th) day after the Closing Date.

               7.  Promptly after Purchaser and Seller jointly agree upon
          disposition of such funds or Final Judgment with respect to all
          Eligible Claims has been entered, the closing escrowee shall pay the
          appropriate amount(s) to Purchaser, and may distribute the balance of
          the Holdback Funds, if any, and this holdback arrangement under this
          Section 10(P) shall thereupon terminate.  Purchaser shall pay all
          costs for the escrow, if any.

               8.  At Closing, Seller, Purchaser and the closing escrowee shall
          enter into an agreement with respect to the arrangement with respect
          to the arrangements described in this Section 10(P).  Such agreement
          shall be referred to herein as the "Post-Closing Escrow Agreement".

     Q.  Conflict.  In the event of a conflict between the terms and provisions
     of the Confidentiality Agreement and this Agreement, the terms and
     provisions of this Agreement shall control.

     R.  No survival unless specifically provided.  Except as specifically
     provided for in this Agreement, the rights, obligations, representations,
     warranties, covenants and agreements of the parties set forth in this
     Agreement shall not survive the Closing or any termination of this
     Agreement.

     S.  No third-party beneficiaries.  Except as specifically provided herein,
     no third parties shall have the benefit of any of the provisions of this
     Agreement, nor is this Agreement made with the intent that any person or
     entity other than Seller and Purchaser shall rely hereon.

     T.  Letter of Intent.  Effective as of the date of this Agreement, the
     Letter of Intent is terminated and of no further force and effect.

     U.  Potential Mechanic's Liens related to Tenant Buildout.  Should the
     timing and/or scope of work to be performed by the lessor under Leases
     and/or New Leases require Seller to enter into contracts with contractors
     or other parties during the period between expiration of the Inspection
     Period and Closing in order to comply with the lessor's obligations under
     such Leases and/or New Leases and the work performed under such contracts
     will not be completed prior to Closing, Seller shall submit the proposed
     contract with such contractor or other parties to Purchaser for its
     approval.  Purchaser shall have the right (exercisable in its reasonable
     discretion) to approve or disapprove of such contract.  If Purchaser fails
     to approve or disapprove of such contract within five (5) business days
     after its receipt of same, Purchaser shall be deemed to have conclusively
     approved of such contract.  In the event Purchaser reasonably disapproves
     of such contract within such five (5) business day period, Seller shall not
     enter into such contract.  If a contract approved under this Section 10(U)
     requires that Seller pay any amounts under such contract prior to Closing,
     Seller shall pay such amounts (and such amounts shall be prorated between
     Purchaser and Seller as provided in Sections 4(C)(i)(c) and 4(C)(i)(d)
     above).  At Closing, Purchaser shall assume the obligations of Seller under
     all contracts approved under this Section 10(U) and all Service Contracts
     with respect to construction, including the obligation for payment of all
     amounts owed under such contracts and Service Contracts after Closing.  If
     any such approved contract(s) and/or Service Contracts result in work for
     which the 

                                      26
<PAGE>
 
     provider or subcontractor thereunder may obtain a lien against the Property
     if such work is not paid for and Purchaser is obligated to pay for such
     work as provided in the preceding sentence, then the "Permitted Exceptions"
     shall be deemed to include any potential liens and related notices of
     commencement as a result thereof. The provisions of this Section 10(U)
     shall survive the Closing and delivery of the Deed.

     V.  Trustee Exculpation.  This Agreement is executed by the undersigned
     Trustee, not personally but solely as Trustee in the exercise of the power
     and authority conferred upon and invested in it as trustee under the Trust.
     It is expressly understood and agreed by all parties to this Agreement that
     all the warranties, indemnities, representations, covenants, undertakings
     and agreements herein made on the part of the Trustee are undertaken by the
     Trustee solely in the Trustee's capacity as Trustee and not personally.  No
     personal liability or personal responsibility is assumed by or shall at any
     time be asserted or enforceable against such Trustee on account of any
     warranty, indemnity, representation, covenant, undertaking or agreement of
     the Trustee in this Agreement.

     W.  Use of "Seller".  The term "Seller" as used herein shall be construed
     to refer only to Trust or Beneficiary, as the case may be, if the context
     in which such term is used requires such construction.

     X.  Operation of Property.  Seller hereby covenants and agrees with
     Purchaser that:

               1.  Between the date of this Agreement and the Closing Date and
         except as permitted under Section 10(U) above or under Section 10(Z)
         below, Seller shall not enter into any new Service Contracts, or
         cancel, materially modify or renew any existing Service Contracts,
         without the prior written consent of Purchaser, which consent shall not
         be unreasonably withheld or delayed, unless such new Service Contracts
         are cancelable by Seller prior to Closing without penalty to Purchaser.
         If Purchaser fails to respond to such a request for consent within five
         (5) business days after receipt of the request, such consent shall be
         deemed given.

               2.  Between the date of this Agreement and the Closing Date,
         Seller shall maintain the liability and casualty insurance coverage
         with respect to the Property in effect as of the date of this
         Agreement.

               3.  Between the date of this Agreement and the Closing Date,
         Seller shall operate the Property in the normal course of Seller's
         business and maintain the Property in the same condition as of the date
         of this Agreement, ordinary wear and tear excepted and subject to
         Section 5 above. Notwithstanding anything in the preceding sentence to
         the contrary, in no event shall Seller be required to make any capital
         improvements to the Property or expend, in the aggregate, in excess of
         $25,000 for repairs (the extent and scope of which shall be determined
         by Seller in its reasonable discretion).

               4.  Between the date of this Agreement and the Closing Date and
         except as required by law or by any of the Permitted Exceptions or as
         otherwise permitted under this Agreement, Seller shall not become party
         to agreements granting an easement, right-of-way of license on, under
         or about the Property or for the use of the Property, and Seller shall
         not become party to any agreements granting easements, rights-of-way or
         licenses in favor of the Property or otherwise encumber, or grant
         interests in, the Property.

                                      27
<PAGE>
 
     Y.  Audit Letter.  At Purchaser's request at any time from and after the
     date hereof until the date that is four (4) months after the Closing Date,
     Seller shall, at Purchaser's expense, provide to Purchaser's designated
     independent auditor reasonable access to the books and records of the
     Property, regarding the period for which Purchaser is required to have
     audited financial statements prepared with respect to the Property as may
     be required by the Securities and Exchange Commission, but only to the
     extent that such books, records and related information are in Seller's
     possession or control and relate to the period during which Seller held
     title to the Property.  Further, Seller agrees to provide such auditor a
     representation letter regarding the books and records of the Property at
     the time of such audit and after Seller's receipt and approval of a final
     draft of the auditor's financial statements and proposed opinion, in
     substantially the form of EXHIBIT X attached hereto, in connection with the
     normal course of auditing the Property in accordance with generally
     accepted auditing standards (but shall not thereby be deemed to have made
     any representation or warranty to Purchaser or to any other third party).

     Z.  Union Employees; Union Contract.  The Service Contracts include a
     collective bargaining agreement with the International Union of Operating
     Engineers of Chicago, Illinois and Vicinity Local No. 399 (the "Union") for
     the period June 1, 1996 through May 31, 1998 (the "Union Contract").  The
     Union Contract's term has expired as of the date hereof and a new
     collective bargaining agreement (the "New Global Union Contract") has not
     yet been executed by the Union and BOMA and may not be executed prior to
     Closing. In the event that the New Global Union Contract is executed after
     the date hereof and the Union provides Seller with a new union contract for
     the Property prior to Closing, Seller shall be permitted to enter into such
     new union contract provided it covers only the Building and is consistent
     with the New Global Union Contract. In the event the new union contract
     covers other portions of the Real Property in addition to the Building and
     Seller nevertheless executes the new union contract, such execution by
     Seller shall not be a default by Seller hereunder and Purchaser's only
     remedy in connection with such execution by Seller shall be to terminate
     this Agreement. Such termination must occur upon the earlier of two (2)
     business days after Purchaser's receipt of written notice of such execution
     and Closing. In the event that Purchaser does not elect to so terminate
     within the time period provided for in the preceding sentence, this
     Agreement shall continue in full force and effect and Seller shall not have
     any liability to Purchaser in connection with its execution of the new
     union contract. Prior to Closing, Seller and EOPMC intend to continue to
     act with respect to the Union and any employee at the Property subject to
     the Union Contract pursuant to the terms of the Union Contract, in the same
     manner and to the same extent as in the past or, if a New Global Union
     Contract or a new union contract is entered into by Seller, pursuant to
     such New Global Union Contract or new union contract, as applicable. At
     Closing, Purchaser's assumption of the Service Contracts pursuant to the
     Service Contract Assumption shall include the Union Contract or, in the
     event the new union contract has been executed, the new union contract. In
     order to assure compliance with the Union Contract, the New Global Union
     Contract and/or the new union contract, Purchaser covenants and agrees,
     upon Closing, to comply with all of the foregoing contracts, including
     hiring any employee required to be employed pursuant to such contracts on
     the terms and conditions required by such contracts. The terms and
     provisions of this Section 10 (Z) shall survive Closing and the delivery of
     the Deed or sooner termination of this Agreement.

     AA.  Section 1031 Exchange.  Purchaser may consummate the purchase of the
     Property as part of a so-called like-kind exchange (the "Exchange")
     pursuant to (S)1031 of the Internal Revenue Code of 1986, as amended (the
     "Code"), but only so long as:  (i) the Closing is not delayed or affected
     by reason of the Exchange, it being agreed that the consummation or
     accomplishment of the Exchange is not a condition precedent or condition
     subsequent to any party's obligations under this Agreement; (ii) the
     Purchaser effects the Exchange through an 

                                      28             
<PAGE>
 
     assignment of Purchaser's rights (but not obligations) under this Agreement
     to a qualified intermediary, it being agreed that Seller is not required to
     take an assignment of the purchase agreement for the relinquished property
     and is not required to acquire or hold title to any real property or other
     property for purposes of consummating the Exchange; and (iii) the Purchaser
     pays any additional costs that would not otherwise have been incurred by
     either party had the Purchaser not consummated its purchase through the
     Exchange. The assignment of its rights under this Agreement by Purchaser to
     the qualified intermediary will not affect or diminish any obligations of
     Purchaser hereunder. Furthermore, the Seller shall not by this agreement or
     acquiescence to the Exchange: (1) have its rights under this Agreement
     affected or diminished in any manner; or (2) be responsible for compliance
     with or be deemed to have warranted to the Purchaser that the Exchange in
     fact complies with (S) 1031 of the Code. Purchaser agrees to indemnify,
     defend and hold Seller harmless of, from and against any and all losses,
     costs, liabilities, expenses, suits, claims, demands and the like arising
     from, in connection with or with respect to the Exchange. The provisions of
     this Section 10(AA) shall survive Closing and the delivery of the Deed or
     sooner termination of the Agreement.


              [THE REMAINDER OF THIS PAGE IS INTENTIONALLY BLANK]

                                      29
<PAGE>
 
     IN WITNESS WHEREOF, Seller and Purchaser have executed and delivered this
Agreement as of the date first above written.

                             TRUST:

                             AMERICAN NATIONAL BANK AND TRUST COMPANY OF
                             CHICAGO, NOT PERSONALLY, BUT SOLELY AS TRUSTEE
                             UNDER TRUST AGREEMENT DATED MARCH 14, 1991 AND
                             KNOWN AS TRUST NUMBER 113531-09

                             By:____________________________________________
                             Name:__________________________________________
                             Its:___________________________________________


                             BENEFICIARY:

                             1800 SHERMAN ASSOCIATES, an Illinois general
                             partnership

                             By: First Capital Income and Growth Fund-Series
                                 XII, an Illinois limited partnership, a general
                                 partner

                                 By: First Capital Financial Corporation, a
                                     Florida corporation, its general partner

                                 By:_______________________________________
                                 Name:_____________________________________
                                 Its:______________________________________

                             By: First Capital Growth Fund-XIV, a Real Estate
                                 Limited Partnership, an Illinois limited
                                 partnership, a general partner

                                 By: First Capital Fund-XIV, Inc., an Illinois
                                     corporation, its general partner

                                 By:_______________________________________
                                 Name:_____________________________________
                                 Its:______________________________________

                                      30
<PAGE>
 
                         PURCHASER:

                         PRENTISS PROPERTIES ACQUISITON PARTNERS, L.P., a
                         Delaware limited partnership

                         By: Prentiss Properties I, Inc., a Delaware
                             corporation, its general partner


                             By:______________________________________
                             Print Name:______________________________
                             Its:_____________________________________

                                      31
<PAGE>
 
                               LIST OF EXHIBITS
                               ----------------

                         A - Legal Description
                         B - Permitted Exceptions
                         C - Service Contracts
                         D - Joint Order Escrow Agreement
                         E - Assignment and Assumption of Leases
                             and Security Deposits
                         F - Assignment and Assumption of Service Contracts
                         G - Form Tenant Estoppel Certificate
                         H - List of Litigation
                         I - Violations of Law
                         J - Bill of Sale
                         K - Tangible Personal Property
                         L - Notice Letter to Tenants
                         M - Notice Letter to Vendors
                         N - Rent Roll
                         O - OSHA Letter
                         P - Environmental Reports
                         Q - Confidentiality Agreement
                         R - Quit Claim Assignment of Permits and General
                             Intangibles
                         S - T.I and Commissions - New Leases Approved Prior to
                             Date of Agreement
                         T - T.I. and Commissions - Existing Leases
                         U - Settlement of Assessed Values - Applicable Tax
                             and/or Calendar Years
                         V - Survey Certification
                         W - Lease Defaults - Seller
                         X - Audit Letter
                         Y - 1998 Tax Appeal Submissions

                                      32
<PAGE>
 
                                   EXHIBIT A
                               LEGAL DESCRIPTION
                               -----------------


LOT 1 IN PLAT OF CONSOLIDATION RECORDED AUGUST 20, 1984 AS DOCUMENT NO. 27219845
OF PART OF BLOCK 8 IN THE VILLAGE OF EVANSTON, A SUBDIVISION OF PART OF SECTION
13, TOWNSHIP 41 NORTH, RANGE 13 EAST OF THE THIRD PRINCIPAL MERIDIAN, AND OF
SECTIONS 7, 18, 19, TOWNSHIP 41 NORTH, RANGE 14 EAST OF THE THIRD PRINCIPAL
MERIDIAN, IN COOK COUNTY, ILLINOIS
<PAGE>
 
                                   EXHIBIT B
                             PERMITTED EXCEPTIONS
                             --------------------
                                        

1.   Acts of Purchaser, and those claiming by, through and under Purchaser.

2.   General and special taxes and assessments for the years 1997, 1998 and
     subsequent years not yet delinquent.

3.   Rights of tenants as tenants only under the Leases.

4.   Zoning, building and other governmental and quasi-governmental laws, codes
     and regulations.

5.   The land lies within the boundaries of a special service area as disclosed
     by ordinance recorded as Document 95439436, and is subject to additional
     taxes under the terms of said ordinance and subsequent related ordinances.

6.   Grant of easement made by the City of Evanston to Commonwealth Edison for
     public utility purposes over that part of the land described as Exhibit "A"
     of said grant by document recorded as No. 85128528.
<PAGE>
 
                                   EXHIBIT C
                               SERVICE CONTRACTS
                               -----------------
                                        

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------
                                            OPERATING CONTRACTS
- -----------------------------------------------------------------------------------------------------------
<S>                                                        <C>
                VENDOR NAME                                                TYPE OF SERVICE
- -----------------------------------------------------------------------------------------------------------
Lakeside Building Maintenance                              Cleaning & Dayporter services (2 contracts)
- -----------------------------------------------------------------------------------------------------------
Rentokil, Inc.                                             Interior plant maintenance
- -----------------------------------------------------------------------------------------------------------
The Brickman Group, L.T.D.                                 Landscaping & Irrigation (2 contracts)
- -----------------------------------------------------------------------------------------------------------
Illinois Recycling Services, Inc.                          Recycling services
- -----------------------------------------------------------------------------------------------------------
Admiral Security Services, Inc.                            Security
- -----------------------------------------------------------------------------------------------------------
A. W. Zengler Uniform Rental                               Uniform rental
- -----------------------------------------------------------------------------------------------------------
Program Professional Services, Inc.                        Window cleaning
- -----------------------------------------------------------------------------------------------------------
Otis Elevator Company                                      Elevator contract
- -----------------------------------------------------------------------------------------------------------
Smithereen Exterminating Company                           Pest control
- -----------------------------------------------------------------------------------------------------------
BFI Waste Systems                                          Rubbish collections
- -----------------------------------------------------------------------------------------------------------
Advent Systems, Inc.                                       Security system
- -----------------------------------------------------------------------------------------------------------
HOH Chemicals, Inc.                                        Water treatment
- -----------------------------------------------------------------------------------------------------------
ERG Industries                                             Snow plowing
- -----------------------------------------------------------------------------------------------------------
International Union of Operating Engineers of Chicago,     Collective Bargaining Agreement
 Illinois and Vicinity Local No. 399
- -----------------------------------------------------------------------------------------------------------
Thomas A. Tully & Associates                               Tax consultant
- -----------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------
TENANT NAME                                                                BROKER AGREEMENT
- -----------------------------------------------------------------------------------------------------------
Keith Block M.D. (Ste 390)                                 Draper & Kramer (no separate agreement exists;
                                                           obligations to Draper & Kramer arise under
                                                           Tenant's Lease)
- -----------------------------------------------------------------------------------------------------------
Disciplined Investment Advisors, Inc.                      Equis
- -----------------------------------------------------------------------------------------------------------
Evanston Medical Specialists Foundation                    Baird & Warner
- -----------------------------------------------------------------------------------------------------------
Federal Express Corporation                                Mesirow Stein
- -----------------------------------------------------------------------------------------------------------
JH Ferguson & Associates                                   Real Source
- -----------------------------------------------------------------------------------------------------------
Sachs Group, Inc.                                          Julien Studley, Inc.
- -----------------------------------------------------------------------------------------------------------
St. Francis Hospital Corporation (Ste 106 & 108)           CB Commercial
- -----------------------------------------------------------------------------------------------------------
Systat, Inc.                                               Julien Studley
- -----------------------------------------------------------------------------------------------------------
ZS Associates, Inc.                                        BKB Commercial
- -----------------------------------------------------------------------------------------------------------
</TABLE>


<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------
                                            REVENUE AGREEMENTS
- -----------------------------------------------------------------------------------------------------------
<S>                                                        <C>
                      LICENSEE                                             TYPE OF SERVICE
- -----------------------------------------------------------------------------------------------------------
United Parcel Service, Inc.                                Drop box
- -----------------------------------------------------------------------------------------------------------
Paging Network of Illinois, Inc.                           Antenna Site License agreement
- -----------------------------------------------------------------------------------------------------------
Ameritech                                                  Pay phones (2 contracts)
- -----------------------------------------------------------------------------------------------------------
</TABLE>
<PAGE>
 
                                   EXHIBIT D
                         JOINT ORDER ESCROW AGREEMENT
                         ----------------------------
                                        

Exhibit D follows this page.
<PAGE>
 
                                   EXHIBIT E

                           ASSIGNMENT AND ASSUMPTION
                        OF LEASES AND SECURITY DEPOSITS
                        -------------------------------
                                        

     THIS ASSIGNMENT AND ASSUMPTION OF LEASES AND SECURITY DEPOSITS (this
"Assignment") is entered into as of the ______________ day of __________, 1998,
by and between AMERICAN NATIONAL BANK AND TRUST COMPANY OF CHICAGO, NOT
PERSONALLY, BUT SOLELY AS TRUSTEE ("Trustee") UNDER TRUST AGREEMENT DATED MARCH
14, 1991 AND KNOWN AS TRUST NUMBER 113531-09 (the "Trust"), 1800 SHERMAN
ASSOCIATES, an Illinois general partnership ("Beneficiary"; Trust and
Beneficiary are collectively referred to herein as "Assignor"), having offices
at Two North Riverside Plaza, Chicago, Illinois 60606, and
______________________, a __________ ("Assignee"), with an office at
_____________________.

     1.   Property. The "Property" shall mean the real property located in the
City of Evanston, County of Cook, State of Illinois, legally described in
EXHIBIT A attached to this Assignment, together with all of Assignor's right,
title and interest in and to the building, structures and other improvements
located thereon, and commonly known as "1800 Sherman".

     2.   Leases. The "Leases" shall mean all leases affecting the Property, or
any part thereof, which leases are listed on EXHIBIT B attached hereto. "Lease"
shall mean any one of the Leases.

     3.   Security Deposits. "Security Deposits" shall mean all unapplied
security deposits held by Assignor that are set forth on EXHIBIT C attached
hereto for which Purchaser received a credit on the Closing Statement (as
defined in the Contract) or evidenced by a letter of credit assigned to
Purchaser at Closing.

     4.   Contract. "Contract" shall mean that certain Real Estate Sale
Agreement dated _______________, 1998 by and between Assignor, as Seller, and
____________________, as Purchaser, for the purchase and sale of the Property.

     5.   Assignment. For good and valuable consideration received by Assignor,
the receipt and sufficiency of which are hereby acknowledged, Assignor hereby
assigns to Assignee the entire right, title and interest of Assignor in and to
the Leases and the Security Deposits as applicable to the period from and after
the date hereof.

     6.   Assumption. Assignee hereby assumes all of the covenants, agreements
and obligations of Assignor under or in connection with the Leases accruing with
respect to the period from and after the date hereof, and Assignee further
assumes all liability of Assignor for the proper refund or return of the
Security Deposits and the interest on the Security Deposits if, when and as
required by the Leases or otherwise by law (the "Security Deposit Interest"). In
addition, Assignee agrees to pay (i) in accordance with Section 4(C)(i)(c) of
the Contract, the brokerage fees, brokerage or leasing commissions and tenant
improvements costs and/or allowances payable in connection with the New Leases
(as defined in the Contract) set forth on EXHIBIT D attached hereto or as
otherwise described on EXHIBIT D attached hereto; and (ii) in accordance with
Section 4(C)(i)(d) of the Contract, all brokerage fees, leasing commissions,
tenant improvement costs and/or allowances payable in connection with the Leases
set forth on EXHIBIT E attached hereto or as otherwise described on EXHIBIT E
attached hereto not paid
<PAGE>
 
as of the date hereof. The matters assumed by Assignee under this Section 6 are
collectively referred to herein as the "Assumed Obligations".

     7.   Indemnification by Assignee. Assignee hereby unconditionally,
absolutely and irrevocably agrees to indemnify and hold Assignor harmless of,
from and against any and all costs, claims, obligations, damages, penalties,
causes of action, losses, injuries, liabilities and expenses, including, without
limitation, reasonably attorneys' fees, arising out of, in connection with or
accruing under or with respect to the Assumed Obligations.

     8.   Indemnification by Assignor. Assignor hereby unconditionally,
absolutely and irrevocably agrees, during the one hundred eighty (180) day
period after the date of this Assignment (the "Indemnification Period"), to
indemnify and hold Assignee harmless of, from and against any and all costs,
claims, obligations, damages, penalties, causes of action, losses, injuries,
liabilities and expenses, including, without limitation, reasonable attorneys'
fees, arising out of, in connection with or accruing under the Leases with
respect to the period prior to the date of this Assignment except to the extent
same are included in the Assumed Obligations (individually, an "Indemnified
Matter", and collectively, the "Indemnified Matters"). The Indemnified Matters
shall not include, and Assignor shall not be liable in any way to Assignee, any
tenant or any other party in connection with or with respect to, any statement,
allegation or matter: (i) disclosed in any Estoppel Certificate (as defined in
the Contract), or (ii) the existence or the substance of which were contained in
any of the Pre-Closing Disclosures or the Inspection Period Disclosures (as such
terms are defined in the Contract).

     9.   Enforcement. If Assignor or Assignee must resort to a court of law or
equity in order to enforce the provisions of this Assignment as against the
other, the non-prevailing party shall pay the reasonable attorney's fees and
expenses of the prevailing party.

     10.  Third Parties. Except as set forth in Section 12 of this Assignment,
no third party shall have the benefit of any of the provisions of this
Assignment, nor is this Assignment made with the intent that any person or
entity other than Assignor or Assignee rely hereon.

     11.  Limited Liability. By accepting this Assignment, Assignee expressly
understands and agrees that any recovery against Assignor that Assignee may be
entitled to as a result of any claim, demand or cause of action that Assignee
may have against Assignor with respect to this Assignment (including, without
limitation, any Indemnified Matter) shall only be recoverable against Assignor
as provided in Section 10(P) of the Contract.

     12.  Successors and Assigns. This Assignment shall be binding upon and
inure to the benefit of the parties hereto and their respective successors and
assigns.

     13.  Counterparts. This Assignment may be executed in any number of
identical counterparts, any or all of which may contain signatures of fewer than
all of the parties but all of which taken together shall constitute a single
instrument.

     14.  Trustee Exculpation. This Assignment is executed by the undersigned
Trustee, not personally but solely as Trustee in the exercise of the power and
authority conferred upon and invested in it as trustee under the Trust. It is
expressly understood and agreed by all parties to this Assignment that all the
warranties, indemnities, representations, covenants, undertakings and
Assignments herein made on the part of the Trustee are undertaken by the Trustee
solely in the Trustee's capacity as Trustee and not personally. No personal
liability or personal responsibility is assumed by or shall at any time be

                                       2
<PAGE>
 
asserted or enforceable against such Trustee on account of any warranty,
indemnity, representation, covenant, undertaking or Assignment of the Trustee in
this Assignment.


              [THE REMAINDER OF THIS PAGE IS INTENTIONALLY BLANK]

                                       3
<PAGE>
 
 [signature page attached to Assignment and Assumption of Leases and Security
                                   Deposits]

     IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment the
day and year first above written.

                             TRUST:

                             AMERICAN NATIONAL BANK AND TRUST COMPANY OF
                             CHICAGO, NOT PERSONALLY, BUT SOLELY AS TRUSTEE
                             UNDER TRUST AGREEMENT DATED MARCH 14, 1991 AND
                             KNOWN AS TRUST NUMBER 113531-09

                             By:_____________________________________________
                             Name:___________________________________________
                             Its:____________________________________________


                             BENEFICIARY:

                             1800 SHERMAN ASSOCIATES, an Illinois general
                             partnership

                             By: First Capital Income and Growth Fund-Series
                                 XII, an Illinois limited partnership, a general
                                 partner

                                 By: First Capital Financial Corporation, a
                                     Florida corporation, its general partner

                                     By:_____________________________________
                                     Name:___________________________________
                                     Its:____________________________________

                             By: First Capital Growth Fund-XIV, a Real Estate
                                 Limited Partnership, an Illinois limited
                                 partnership, a general partner

                                 By: First Capital Fund-XIV, Inc., an Illinois
                                     corporation, its general partner

                                     By:_____________________________________
                                     Name:___________________________________
                                     Its:____________________________________

                                       4
<PAGE>
 
                         ASSIGNEE:

                         PRENTISS PROPERTIES ACQUISITON PARTNERS, L.P., a
                         Delaware limited partnership

                         By: Prentiss Properties I, Inc., a Delaware
                             corporation, its general partner


                             By:____________________________________________
                             Print Name:____________________________________
                             Its:___________________________________________


                                   EXHIBITS
                                   --------
 

                           A - Legal Description of the Property
                           B - List of Leases
                           C - Security Deposits
                           D - T.I. and Commissions - New Leases
                           E - T.I. and Commissions - Existing Leases

                                       5
<PAGE>
 
                                   EXHIBIT F
                ASSIGNMENT AND ASSUMPTION OF SERVICE CONTRACTS
                ----------------------------------------------
                                        

     THIS ASSIGNMENT AND ASSUMPTION OF SERVICE CONTRACTS (this "Assignment") is
entered into as of the ____ day of __________, 1998 by and between AMERICAN
NATIONAL BANK AND TRUST COMPANY OF CHICAGO, NOT PERSONALLY, BUT SOLELY AS
TRUSTEE ("Trustee") UNDER TRUST AGREEMENT DATED MARCH 14, 1991 AND KNOWN AS
TRUST NUMBER 113531-09 (the "Trust"), 1800 SHERMAN ASSOCIATES, an Illinois
general partnership ("Beneficiary"; Trust and Beneficiary are collectively
referred to herein as "Assignor"), having offices at Two North Riverside Plaza,
Chicago, Illinois 60606, and ________________, a __________ ("Assignee"), with
an office at ________________________________.

     1.   Property. The "Property" shall mean the real property located in the
City of Evanston, County of Cook, State of Illinois, legally described in
EXHIBIT A attached to this Assignment, together with all of Assignor's right,
title and interest in and to the building, structures and other improvements
located thereon, and commonly known as "1800 Sherman".

     2.   Contract. "Contract" shall mean that certain Real Estate Sale
Agreement dated _______________, 1998 by and between Assignor, as Seller, and
_________________, as Purchaser, for the purchase and sale of the Property.

     3.   Service Contracts. "Service Contracts" shall mean the service
contracts entered into with respect to the ownership and operation of the
Property that are listed on EXHIBIT B attached to this Assignment.

     4.   Assignment. For good and valuable consideration received by Assignor,
the receipt and sufficiency of which are hereby acknowledged, Assignor hereby
assigns to Assignee the entire right, title and interest of Assignor in and to
the Service Contracts as applicable to the period from and after the date
hereof.

     5.   Assumption. Assignee hereby assumes all of the covenants, agreements
and obligations of Assignor under or in connection with the Service Contracts
accruing with respect to the period from and after the date hereof.

     6.   Enforcement. If Assignor or Assignee must resort to a court of law or
equity in order to enforce the provisions of this Assignment as against the
other, the non-prevailing party shall pay the reasonable attorney's fees and
expenses of the prevailing party.

     7.   Third Parties. Except as set forth in Section 10 of this Assignment,
no third party shall have the benefit of any of the provisions of this
Assignment, nor is this Assignment made with the intent that any person or
entity other than Assignor or Assignee shall rely hereon.

     8.   No Representations or Warranties. This Assignment shall not be
construed as a representation or warranty by Assignor as to the transferability
of the Service Contracts, and Assignor shall have no liability to Assignee in
the event that any or all of the Service Contracts (i) are not transferable to
Assignee or (ii) are canceled or terminated by reason of this assignment or any
acts of Assignee.

<PAGE>
 
     9.   Limited Liability. By accepting this Assignment, Assignee expressly
understands and agrees that any recovery against Assignor that Assignee may be
entitled to as a result of any claim, demand or cause of action that Assignee
may have against Assignor with respect to this Assignment shall only be
recoverable against Assignor as provided in Section 10(P) of the Contract.

     10.  Successors and Assigns. This Assignment shall be binding upon and
inure to the benefit of the parties hereto and their respective successors and
assigns.

     11.  Counterparts. This Assignment may be executed in any number of
identical counterparts, any or all of which may contain signatures of fewer than
all of the parties but all of which taken together shall constitute a single
instrument.

     12.  Trustee Exculpation. This Assignment is executed by the undersigned
Trustee, not personally but solely as Trustee in the exercise of the power and
authority conferred upon and invested in it as trustee under the Trust. It is
expressly understood and agreed by all parties to this Assignment that all the
warranties, indemnities, representations, covenants, undertakings and
Assignments herein made on the part of the Trustee are undertaken by the Trustee
solely in the Trustee's capacity as Trustee and not personally. No personal
liability or personal responsibility is assumed by or shall at any time be
asserted or enforceable against such Trustee on account of any warranty,
indemnity, representation, covenant, undertaking or Assignment of the Trustee in
this Assignment.


              [THE REMAINDER OF THIS PAGE IS INTENTIONALLY BLANK]

                                       2
<PAGE>

 
  [signature page attached to Assignment and Assumption of Service Contracts]


     IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment the
day and year first above written.

                             TRUST:

                             AMERICAN NATIONAL BANK AND TRUST COMPANY OF
                             CHICAGO, NOT PERSONALLY, BUT SOLELY AS TRUSTEE
                             UNDER TRUST AGREEMENT DATED MARCH 14, 1991 AND
                             KNOWN AS TRUST NUMBER 113531-09

                             By:______________________________________________
                             Name:____________________________________________
                             Its:_____________________________________________


                             BENEFICIARY:

                             1800 SHERMAN ASSOCIATES, an Illinois general
                             partnership

                             By: First Capital Income and Growth Fund-Series
                                 XII, an Illinois limited partnership, a general
                                 partner

                                 By: First Capital Financial Corporation, a
                                     Florida corporation, its general partner

                                     By:______________________________________
                                     Name:____________________________________
                                     Its:_____________________________________

                             By: First Capital Growth Fund-XIV, a Real Estate
                                 Limited Partnership, an Illinois limited
                                 partnership, a general partner

                                 By: First Capital Fund-XIV, Inc., an Illinois
                                     corporation, its general partner

                                     By:______________________________________
                                     Name:____________________________________
                                     Its:_____________________________________

                                       3
<PAGE>
 
                         ASSIGNEE:

                         PRENTISS PROPERTIES ACQUISITON PARTNERS, L.P., a
                         Delaware limited partnership

                         By: Prentiss Properties I, Inc., a Delaware
                             corporation, its general partner


                             By:_____________________________________________
                             Print Name:_____________________________________
                             Its:____________________________________________



                                   EXHIBITS
                                   --------

                         A  - Legal Description of Property
                         B  - Service Contracts

                                       4
<PAGE>
 
                                   EXHIBIT G
                       FORM TENANT ESTOPPEL CERTIFICATE
                       --------------------------------
                                        

1800 Sherman Associates
c/o Equity Office
Two North Riverside Plaza
Suite 2200
Chicago, Illinois  60606
Attention:  Ms. Alissa Schneider

[Purchaser Name & Address]

THIS IS TO CERTIFY

TO:  Prentiss Properties Acquisition Partners, L.P., Prentiss Properties Trust,
     or their successors or assigns ("Prospective Purchaser") and 1800 Sherman
     Associates, an Illinois general partnership ("Landlord")

1.   The undersigned is the tenant under that certain lease dated
     ________________ with Landlord, with respect to those certain premises
     consisting of approximately _____ square feet in Suite No. ____ (the
     "Premises") of that certain building located at 1800 Sherman, Evanston,
     Illinois (the "Building").

2.   The lease is valid and [to Tenant's knowledge, is] in full force and effect
     on the date hereof. Except as set forth below, the lease represents the
     entire agreement between the Landlord and the Tenant with respect to the
     Premises, and, except as set forth below, is the only agreement, oral or
     written, between the Landlord and the Tenant affecting or relating to the
     Premises. Except as set forth below, the lease has not been modified,
     changed, altered, assigned, supplemented or amended in any way: (all
     amendments, etc. to be listed here)

     ___________________________________________________________________________
     ___________________________________________________________________________
     ___________________________________________________________________________
     (The lease, as modified, changed, altered, assigned, supplemented or
     amended as provided above, is referred to herein as the "Lease").

3.   A true, correct and complete copy of the Lease is attached hereto as
     EXHIBIT A.

4.   Tenant has no option or right to purchase all or any part of the Building.

5.   Tenant has accepted and now occupies the Premises for purposes permitted
     under the Lease.  The expiration date of the Lease term (other than
     unexercised options to extend the Lease) will occur on
     ______________________.

6.   Landlord has complied with all of its construction and [to Tenant's
     knowledge, all] other obligations under the Lease to this date, and Tenant
     is fully obligated to pay, and is paying, the rent and other charges due
     thereunder, and is fully obligated to perform, and is performing, all of
     the other obligations of Tenant under the Lease [to Tenant's knowledge,]
     without right of counterclaim, offset or defense, except as specifically
     provided in the Lease.
<PAGE>
 
7.   No one except the Tenant and its employees occupies the Premises.  Tenant
     has not sublet the Premises, or any part thereof, or assigned any of its
     rights under the Lease, except as indicated herein:
 
     ___________________________________________________________________________
     ___________________________________________________________________________
     ___________________________________________________________________________
     (if none, state "none").

8.   Tenant has paid rent for the Premises for the period up to and including
     _______________, 19__. The current base rent payable by Tenant is
     $__________ per month. The current common area maintenance and other
     charges payable by Tenant (including the Tenant's share of real estate
     taxes, insurance and operating expenses) is $__________ per month. The base
     year under the Lease is __________ and the base year amount is $_________.
     No such rent has been paid more than one (1) month in advance of its due
     date except as indicated herein:
 
     ___________________________________________________________________________
     ___________________________________________________________________________
     ___________________________________________________________________________
     (if none, state "none").

9.   Tenant's security deposit is $_________, which security deposit has been
     deposited with Landlord and is not subject to increase for interest or
     other credit due to Tenant.

10.  There are no uncured defaults by Landlord or Tenant under the Lease and, to
     Tenant's knowledge, no event has occurred and no condition exists which,
     with the giving of notice or the lapse of time or both, will constitute a
     default under the Lease. Tenant has no existing defenses, offsets or
     credits against the enforcement of this Lease by the Landlord or the
     payment of rent for the Premises.

11.  No actions, whether voluntary or otherwise, are pending against the Tenant
     under the bankruptcy laws of the United States or any state thereof.

12.  Tenant's current notice address is set forth in the Lease, or is as set
     forth below:
 
     ___________________________________________________________________________
     ___________________________________________________________________________
     ___________________________________________________________________________

13.  The undersigned is authorized by all necessary action of Tenant to execute
     this Tenant Estoppel Certificate on behalf of Tenant.

14.  Landlord has not, as an inducement, assumed any of Tenant's lease
     obligations at other buildings that remain to be performed after the date
     hereof and has made no agreements with Tenant covering free rent, partial
     rent, rebate of rental payments or any other type of rental concession with
     respect to the period from and after the date hereof, except as set forth
     below:

15.  All conditions of the Lease to be performed by Landlord and necessary to
     the enforceability of the Lease have, to Tenant's knowledge, been
     satisfied.

                                       2
<PAGE>
 
16.  Tenant acknowledges that the statements in this Tenant's Estoppel
     Certificate may be relied upon by Landlord, Prospective Purchaser, Prentiss
     Properties Trust, a real estate investment trust, their respective
     affiliates, and their successors and assigns, Lehman Brothers Holdings,
     Inc., d/b/a Lehman Capital, a Division of Lehman Brothers Holdings, Inc.;
     Lehman Brothers Realty Corporation; Bank One Texas, N.A., as Administrative
     Agent; Nations Bank of Texas, N.A., as Documentation Agent; and to each of
     the Lenders pursuant to that certain Credit Agreement between Borrower, the
     Administrative Agent, the Documentation Agent and any other lender which
     now or hereafter holds a lien on the Building, for itself or as agent for
     itself and other lenders, and any such lender's or lenders' successors and
     assigns.

Dated this _____ day of __________, 1998.

                                 TENANT:
 
                                 -----------------------------------------

                                 By:
                                    -------------------------------------
                                 Name: 
                                      -----------------------------------
                                 Title:
                                       ---------------------------------- 

<PAGE>
 
                                   EXHIBIT H
                               LIST OF LITIGATION
                               ------------------


None.

<PAGE>
 
                                   EXHIBIT I
                               VIOLATIONS OF LAW
                               -----------------

                                        
None.

<PAGE>
 
                                   EXHIBIT J
                                 BILL OF SALE
                                 ------------
                                        
                         SPECIAL WARRANTY BILL OF SALE
                         -----------------------------


     THIS SPECIAL WARRANTY BILL OF SALE (this "Bill of Sale") is executed as of
the ____ day of _________, 1998, by 1800 SHERMAN ASSOCIATES, an Illinois general
partnership, ("Seller"), having offices at Two North Riverside Plaza, Chicago,
Illinois 60606, in favor of __________________, a __________ ("Purchaser"), with
an office at ___________________________________________.

     1.  Property. The "Property" shall mean the real property located in the
City of Evanston, Illinois, legally described in EXHIBIT A attached to this Bill
of Sale, together with all of Seller's right, title and interest in and to the
building, structures and other improvements located thereon, and commonly known
as "Meidinger Tower".

     2.  Personal Property.  The "Personal Property" shall mean the Tangible
Personal Property as defined in that certain Real Estate Sale Agreement dated
the ___ day of _____________, 1998 (as amended, the "Contract"), by and between
Seller and American National Bank and Trust Company of Chicago, not personally,
but solely as Trustee under Trust Agreement dated March 14, 1991 and known as
Trust Number 113531-09, as the "Seller" thereunder, and ____________, as the
"Purchaser" thereunder with respect to the purchase and sale of the Real
Property and other property as described therein, as such Personal Property is
more particularly described on attached EXHIBIT C.

     3.  Sale.  For good and valuable consideration received by Seller, the
receipt and sufficiency of which are hereby acknowledged, Seller hereby sells,
assigns and transfers the Personal Property to Purchaser free of any liens or
encumbrances other than those matters set forth on EXHIBIT B attached hereto
(the "Permitted Exceptions").  Seller covenants and agrees to warrant specially
and forever defend title to the Personal Property unto Purchaser against all and
every person or persons lawfully claiming the whole or any part thereof by,
through or under Seller, and none other, but subject in any event to the
Permitted Exceptions.  Except as set forth in the two (2) preceding sentences,
Seller makes no warranties or representations as to the Personal Property.  The
Personal Property is transferred "AS IS, WHERE IS" and ALL WARRANTIES OF
QUALITY, FITNESS AND MERCHANTABILITY ARE HEREBY EXCLUDED.

     4.  Limited Liability. By accepting this Bill of Sale, Purchaser expressly
understands and agrees that any recovery against Seller that Purchaser may be
entitled to as a result of any claim, demand or cause of action that Purchaser
may have against Seller with respect to this Bill of Sale shall only be
recoverable against Seller as provided in Section 10(P) of the Contract.

     IN WITNESS WHEREOF, Seller has executed this Bill of Sale the day and year
first above written.

                         SELLER:

       
<PAGE>
 
                                   EXHIBIT K
                          TANGIBLE PERSONAL PROPERTY
                          --------------------------

                                     Tools

<TABLE>
<CAPTION>

Item                                                                  Quantity
- --------------------------------------------------------------------------------
<S>                                                                   <C>
Simpson 260 volt ohm meter                                                   1
Dwyer 470-1 hand held thermal anemometer                                     1
3X734B Fluorescent trouble light                                             1
#6507 Milwaukee sawsall (no case)                                            1
Skill jig saw                                                                1
Milwaukee 3/8" drill                                                         1
Arrow stapler                                                                1
Ilco key machine                                                             1
Amprobe ACD-2 digital clamp on amp meter                                     1
Skill circular saw                                                           1
Greenlee 6706 boltage and continuity tester                                  1
Tif 5500 Halogen leak detector                                               1
Dayton 22425Q bench grinder                                                  1
12" cresent wrench                                                           1
8" cresent wrench                                                            1
12" channel locks                                                            1
Combination wrenches 1 1/8-3/8"                                         2 Sets
1/2" drive socket set                                                        1
3/8" drive socket set                                                        1
Wire strippers                                                               3
Pry bar                                                                      2
Claw hammer                                                                  1
#3 sledge hammer                                                             1
Rubber mallet                                                                1
Pop rivet tool                                                               1
Grease gun (12" flexible hose)                                               1
Oilers                                                                       3
Needle nose pliers                                                           2
Wire cutter                                                                  1
H.K.P size 0 bolt cutter                                                     1
Dayton Model 6X-628 tap & die set                                            1
#408 C-Clamps                                                                2
#406 C-Clamp                                                                 2
#404 C-Clamp                                                                 2
Handsaw                                                                      3
Hacksaw                                                                      1
Miter saw                                                                    1
Ridgid E-110 pipe wrench                                                     1
Amprobe AM-1250 multi-meter                                                  1
14" channel locks                                                            1
36" pipe wrench                                                              1
24" pipe wrench                                                              1
18" pipe wrench                                                              1
14" pipe wrench                                                              1
10" pipe wrench                                                              1
</TABLE>
<PAGE>
 
<TABLE>
<CAPTION> 

Item                                                                  Quantity
- --------------------------------------------------------------------------------
<S>                                                                   <C>
Allen wrenches                                                           1 Set
Diamond sheet metal cutters                                                  1
Flare tool kit                                                               2
Ball pin hammer                                                              2
Propane torch                                                                1
Acytelene torch                                                              1
Wooden saw horses                                                            2
Roll cart                                                                    1
Genie model PLC-24 (hi-jacker)                                               1
8HP snow blower                                                              1
3HP Toro lawn mower 21"                                                      1
Tool box                                                                     1
4' level                                                                     1
Soft face hammer                                                             1
Soldering iron                                                               1
Tool belt                                                                    1
File set                                                                     1
Pick                                                                         1
2 Wheel carts                                                                2
Appliance cart                                                               1
Rake                                                                         3
Hoe                                                                          1
Flat shovel                                                                  2
Rubbermaid #1005 cart                                                        2
8' fiberglass ladder                                                         2
20' extension ladder                                                         1
6' fiberglass ladder                                                         2
6' wooden ladder                                                             1
Genie Quick-Stand                                                            2
Fertilizer spreader                                                          1
Large Salt spreader                                                          1
Hardwood dollies                                                             2
Teel 5HP gasoline centrifugal pumps & 3' hose                                1
200' 3" PVC discharge hose                                                   1
Wheelbarrow                                                                  1
50" X 3 X 12 gauge extension cord                                            1
50' X 3 X 16 gauge extension cord                                            2
Diamond monkey wrench                                                        1
Screw drivers                                                            1 Set
Dremel tool                                                                  1
Nut drivers                                                              1 Set
Vise grips                                                               1 Set
Model 1212 weed eater (electrical)                                           1
Hedge trimmer                                                                1
Wayne submersible utility pump                                               1
Utility knife                                                                1
Putty knife                                                                  2
200' 5/8" garden hose                                                        2
Linemans pliers                                                              2
Flashlight                                                                   3
</TABLE>

                                       2
<PAGE>
 
<TABLE>
<CAPTION> 

Item                                                                  Quantity
- --------------------------------------------------------------------------------
<S>                                                                   <C>
Chain wrench cresent                                                         1
Spud wrench                                                                  1
Wire brush                                                                   1
Screw-bit set                                                                1
Hand notcher                                                                 1
Tensioning tool                                                              1
Coping saw                                                                   1
Hew-bit set                                                                  1
Tapcon tool                                                                  1
O-Ring set                                                                   1
Spring Set                                                                   1
Platform truck                                                               1
Racks 4' X 8'                                                                2
Flatline hose (300')                                                         1
Hose reel                                                                    1
Leaf Blower                                                                  1
Motorola HT 90 2-way radios w/chargers                                       5
B&D Cordless drill (12 volt)                                                 1
Wet/Dry vac                                                                  1
Heat Gun                                                                     1
Combination Square                                                           1
Rafter Square                                                                1
Tape Measure                                                                 2
Drill sets                                                                   3
Step drill set                                                               1
Hole saw kit                                                                 1
Vise                                                                         1
1/4" drive set                                                               1
Electric rodder                                                              1
Hand toilet rodder                                                           1
Toro S-2000 snow thrower                                                     1
3 jaw wheel puller                                                           1
3.5 HP speeddrive compressor                                                 1
Ryobi 31CC edger                                                             1
Assorted nuts & bolts trays                                                 16
Snap-ring pliers                                                             1
Anvil                                                                        1
Drill press vise                                                             1
Drill press                                                                  1
Bar clamps                                                                   2
Hand stamps                                                                  1
Space heaters                                                                4
Fire cabinet                                                                 1
Push brooms                                                                  5
Pressure washer                                                              1
B&D rotary hammer drill                                                      1
Digital thermometer                                                          1
</TABLE>

                                       3
<PAGE>
 
                              Penthouse Furniture
<TABLE> 
<CAPTION> 

Item                                                                  Quantity
- --------------------------------------------------------------------------------
<S>                                                                   <C>
Service counter                                                              1
Lockers                                                                      3
Stool                                                                        1
Typing stand                                                                 1
3' x 6' tables                                                               2
Metal Desk                                                                   1
Credenza (metal)                                                             1
3' X 5" cabinet                                                              3
Office chair                                                                 1
Work bench                                                                   1
Dell computer (386 SX)                                                       1
HP laserjet printer                                                          1
 
                                   Security
Lathem time clock                                                            1
IBM 386 PS/Valuepoint                                                        1
C-Cure system                                                                1
Epson Dot Matrix Printer                                                     1
 
                               Management Office
Artwork                                                                      9
Limited Edition prints (from previous management)                            6
Office chairs                                                               12
Side table                                                                   1
Computers                                                                    2
Printer                                                                      1
Backpacks                                                                    2
Modems                                                                       2
Qwikshare II                                                                 1
Copier                                                                       1
Paper Shredder                                                               1
Typewriter                                                                   1
Typewriter stand                                                             1
4 drawer file cabinets                                                       3
Conference room table                                                        1
Credenzas                                                                    3
Plain paper fax machine                                                      2
6' wood table                                                                1
4' wood table                                                                1
Microwave                                                                    1
Shelving                                                                     1
Desks                                                                        2
Radios                                                                       2
Refrigerator                                                                 1
60 cup coffee makers                                                         2
</TABLE>

                                       4
<PAGE>
 
<TABLE>
<CAPTION>
                                     Misc.

Item                                                                  Quantity
- --------------------------------------------------------------------------------
<S>                                                                   <C>
Christmas Tree                                                               1
Wreaths                                                                      2
Christmas decorations                                                        1
Menorah                                                                      1
Keycard entrance readers                                                     1
Walk-out mats                                                                1
 
                                  Parking Lot
Cincinnati Time Gates                                                        4
Parking lot full sign                                                        1
Counter                                                                      1
Token box                                                                    1
Card readers                                                                 4
 
                              Engineer's Computer
Dell                                                                     0AFES
Dell Color Monitor                                                  U45301P034
Printer                                                             2531J00201
Keyboard                                                                 43197
 
                            Misc. Office Equipment
Panasonic Fax Machine                                              01951100226
Sharp Fax Machine (Not in use)                                           X6770
IBM Typewriter                                                  118170011PNX47
Sharp SF-8300 Copy Machine                                               A8291
Fellowes Paper Shredder                                  030961010A00100304302
</TABLE>

                                       5
<PAGE>
 
                                   EXHIBIT L
                                   ---------

                           NOTICE LETTER TO TENANTS
                           ------------------------
                                        
           [Letterhead of Equity Office Properties Management Corp.]

                               NOTICE TO TENANTS

                             ______________, 1998

     Re:  1800 Sherman, Evanston, Illinois (the "Property")

Dear Tenant:

     This is to notify you that the Property has been sold to ______________
__________________, and that ___________________________ has been retained by
the new owner as managing agent of the building.

     Any security or other deposits and any prepaid rents under your lease have
been transferred to the new owner.

     Effective immediately, all rental payments with the exception of all
amounts that are unpaid for periods prior to the date hereof, notices to the
Landlord, and correspondence pursuant to your lease should be mailed to the
following address:

     Rents:                                 Notices:

     ___________________________________    ____________________________________

     ___________________________________    ____________________________________

     ___________________________________    ____________________________________

     Attention: ________________________

     All amounts that are unpaid for periods prior to the date hereof are to be
paid to the prior owner of the property in case of the undersigned, Equity
Office Properties Management Corp.

     Additionally, please have new Certificates of Insurance issued naming
____________________ as an additional insured.  Please deliver said Certificate
to new owner at the "Notices" address set forth above.

                                       Very truly yours,

                                       EQUITY OFFICE PROPERTIES MANAGEMENT 
                                       CORP., a Delaware corporation, as agent


                                       By: ____________________________________

                                       Name:___________________________________

                                       Its: ___________________________________

<PAGE>
 
                                   EXHIBIT M
                                   ---------

                           NOTICE LETTER TO VENDORS
                           ------------------------
                                        
           [Letterhead of Equity Office Properties Management Corp.]

                           __________________, 1998


VIA TELECOPY AND
- ----------------
CERTIFIED MAIL, RETURN RECEIPT REQUESTED
- ----------------------------------------

[Vendor]
_________________________
_________________________

     Re:  Sale of 1800 Sherman
          Evanston, Illinois (the "Property")
          -----------------------------------

Dear Service Provider:

     This is to notify you that the Property has been sold to ________________
__________, a _________________ ("Purchaser"), and that ______________________,
having an office at _____________________________, has been retained by the
Purchaser of the Property as managing agent of the building. Purchaser has
assumed all of the obligations of the undersigned under the [license
agreements/service contracts] accruing with respect to the period from and after
the date hereof. All notices to Purchaser should be sent to Purchaser at the
office of the building, and should be sent or delivered to such address in the
manner provided in the [license agreement/service contract].

                                       Very truly yours,

                                       EQUITY OFFICE PROPERTIES MANAGEMENT  
                                       CORP., a Delaware corporation, as agent


                                       By: ____________________________________

                                       Name:___________________________________

                                       Its: ___________________________________
<PAGE>
 
                             EXHIBIT N - RENT ROLL
                                         ---------


<TABLE>
<CAPTION>
                                                                                                  Estimated
                                                                                                  Operating
                                                                                                   Expense     Storage      Aged
                                                                       Monthly                      Pass-       Rent       Delin-
                                                                      Base Rent                    through     Payable    quincies
                                       Security     Sq.      Exp.     Payable as                  Payable as    as of      as of
    Suite #          Tenant Name     Deposit/(2)/   Ft.      Date     of 6/1/98      Base Year    of 6/1/98    5/1/98     6/15/98
- ------------------------------------------------------------------------------------------------------------------------------------
<S>              <C>                  <C>         <C>      <C>       <C>          <C>             <C>         <C>        <C> 
      203        Academic Counseling 
                 Services, Inc.       $ 1,572.25      873   3/31/03  $  1,891.50            1998  $   127.34  $  119.52  $   130.00
- ------------------------------------------------------------------------------------------------------------------------------------
      513        Keith Block, M.D.      2,501.15    1,788   8/31/99     3,352.50            1994      241.01       0.00    3,729.54
- ------------------------------------------------------------------------------------------------------------------------------------
      390        Keith Block, M.D.          0.00    3,230   7/31/02     6,460.00            1997      135.47       0.00    6,439.41
- ------------------------------------------------------------------------------------------------------------------------------------
      515        Keith Block, M.D.          0.00    3,179   8/31/99     5,960.63            1994      428.50     103.14    6,837.27
- ------------------------------------------------------------------------------------------------------------------------------------
      511        Steven V.L. Brown, 
                 M.D., S.C.                 0.00    3,582   5/31/03     7,811.75            1992      523.06       0.00      705.00
- ------------------------------------------------------------------------------------------------------------------------------------
      300        Cass Communica-
                 tions, Inc.                0.00   12,560   7/31/03    21,980.00            1993    2,116.35   1,085.73        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      108        St. Francis Hospi-
                 tal Corporation        7,345.00    4,005   8/31/00     7,676.25            1995      267.94       0.00   26,445.85
- ------------------------------------------------------------------------------------------------------------------------------------
211/205/209/204  Disciplined Invest-
                 ment Advisors, Inc.        0.00    6,681   9/30/06    13,083.63            1996      458.48     200.69        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      301        Thomas A. Doan, 
                 d/b/a Estima           3,157.00    1,968   1/31/00     3,681.80            1994      265.27       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      404        Evanston Medical 
                 Specialists Founda-
                 tion                   4,755.08    2,654   8/31/98     6,068.81            1986    1,549.83     468.10      326.20
- ------------------------------------------------------------------------------------------------------------------------------------
     404A        Evanston Medical 
                 Specialists Founda-
                 tion                       0.00    1,394  11/30/98     3,187.61            1988      738.79       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      110        Federal Express 
                 Corporation                0.00    1,165   3/31/02     2,766.88            1997       48.86       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      402        JH Ferguson & 
                 Associates, Inc./(3)/      0.00    3,647  12/31/03     6,610.19            1994      491.59       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      517        James R. Hodur, 
                 D.D.S., Ltd.           3,658.33    2,195  12/31/01     4,368.24            1991      365.27       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      105        Fonda & Niko, Inc. 
                 d/b/a Kaffeehaus 
                 1800 European Cafe 
                 & Restaurant           4,500.00    2,431   5/31/01     4,815.00             N/A        0.00     140.34      253.09
- ------------------------------------------------------------------------------------------------------------------------------------
      204        LIM Management, Inc.       0.00      775  12/31/98     1,614.58            1994      104.46       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      100        National Equipment 
                 Service, Inc.          5,258.38    1,357   5/31/02     2,685.73            1997       56.92       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      103        Olde Discount 
                 Corporation            4,628.75    2,415  12/16/00     4,628.75            1995      161.38       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      102        Papageorge Hair 
                 Salon                  1,625.00      975  12/31/01     2,275.00            1997       36.18       0.00    2,449.18
- ------------------------------------------------------------------------------------------------------------------------------------
      510        Price Marketing 
                 Group, Inc.                0.00    1,542   9/15/99     2,515.94            1994      207.85     110.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      504        Sachs Group, Inc.          0.00    1,502   1/31/02     2,847.54            1998        0.00       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
    508/600      Sachs Group, Inc.          0.00   16,524   6/30/04    31,326.75  Suite 508-1997    2,063.26   1,058.62        0.00
                                                                                  Suite 600-1994     
- ------------------------------------------------------------------------------------------------------------------------------------
     STOR        Shared Technologies 
                 Fairchild Telecom, 
                 Inc./(1)/                241.67      290   3/31/00       870.00             N/A        0.00       0.00      870.00
- ------------------------------------------------------------------------------------------------------------------------------------
      106        St. Francis Hospi-
                 tal Corporation            0.00    2,367   8/31/00     4,536.75            1995      158.27       0.00    4,906.10
- ------------------------------------------------------------------------------------------------------------------------------------
      800        Systat, Inc.          19,034.83   10,320   8/31/00    18,705.00            1993    1,847.88       0.00   19,807.00
- ------------------------------------------------------------------------------------------------------------------------------------
      601        Dr. Richard Tye, 
                 Ltd.                       0.00    2,204   1/31/02     4,729.42            1995      147.28      76.50        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      208        Arthur Winter/(4)/     2,626.75    2,022   9/30/03     3,713.63            1991      269.98       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      500        Johnathan Yahav, 
                 D.D.S. & Associates
                 P.C.                   1,932.00    1,104  10/31/03     2,116.00            1993      186.92       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      502        Yamada & Associates 
                 P.C.                   2,411.92    1,405  12/31/99     2,529.00            1994      189.38       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
  700/800/200    ZS Associates, Inc.        0.00   29,735  12/31/04    46,938.09            1994    3,976.31     425.33        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      400        ZS Associates, Inc.        0.00    2,648   4/30/00     4,799.50            1997      110.18       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
      401        ZS Associates, Inc.        0.00    6,075  12/31/04    10,757.81            1997      254.80       0.00        0.00
- ------------------------------------------------------------------------------------------------------------------------------------
                                       65,248.11  134,612            $247,304.28                  $17,528.81  $3,787.97  $72,898.64
</TABLE> 

/(1)/  This is a telecommunication license agreement
/(2)/  Paging Network of Illinois also has a security deposit of $500.00
/(3)/  Effective 1/1/99 the Base Year is changed to 1999
/(4)/  Effective 1/1/98 the Base Year is changed to 1998
<PAGE>
 
                                   EXHIBIT O

                                  OSHA LETTER
                                  -----------
                                        

                            _________________, 1998


[Purchaser]




     Re:  Transmittal of Information Regarding Asbestos-Containing
          Material and Presumed Asbestos-Containing Material

Ladies and Gentlemen:

     As you know, the Occupational Safety and Health Administration ("OSHA") has
enacted regulations (the "OSHA Regulations") which require building owners to
provide information regarding the presence, location and quantity of asbestos
containing material ("ACM") and presumed ACM ("PACM") to various building
occupants, including employers of employees who lease space within the owner's
building.  In addition, the OSHA Regulations, specifically 29 C.F.R.
(S)1910.1001(j)(2)(ii) and 29 C.F.R. (S)1926.1101(n)(6), require building owners
to keep records of all information required to be maintained by the OSHA
Regulations and to transmit such records to subsequent owners at or before the
time of closing.

     [Seller] ("Seller"), has, prior to the date of this letter, provided [name
of Purchaser] ("Purchaser") with copies of information required to be maintained
and transmitted as described above regarding ACM and PACM at the property
located at 1800 Sherman, Evanston, Illinois, including copies of notices to
tenants and any related asbestos sampling results and reports in our possession
(such information, notices and reports being referred to herein collectively as
the "Reports"). A list of such Reports is set forth on SCHEDULE 1 attached
hereto.

     The undersigned makes no representation, warranty, promises, covenants,
agreements or guarantees of any kind or character whatsoever, express or
implied, oral or written, past, present or future, of, as to, concerning or with
respect to the information and documentation transmitted herewith including
without limitation, the accuracy or completeness of such Reports, the Reports'
compliance with the OSHA Regulations, or Seller's compliance with the OSHA
Regulations.
<PAGE>
 
     We request that you acknowledge receipt of this letter and the Reports by
signing below and forwarding an executed copy to Seller.

                        Sincerely,

                        BENEFICIARY:

                        1800 SHERMAN ASSOCIATES, an Illinois general partnership
                         

                        By: First Capital Income and Growth Fund-Series XII, an
                            Illinois limited partnership, a general partner

                            By: First Capital Financial Corporation, a Florida
                                corporation, its general partner

                                By:
                                   ----------------------------------------
                                Name:
                                     --------------------------------------
                                Its:
                                     --------------------------------------

                        By: First Capital Growth Fund-XIV, a Real Estate
                            Limited Partnership, an Illinois limited
                            partnership, a general partner

                            By: First Capital Fund-XIV, Inc., an Illinois
                                corporation, its general partner

                                By:
                                   ----------------------------------------
                                Name:
                                     --------------------------------------
                                Its:
                                     --------------------------------------


Acknowledged receipt of this letter and the
Reports this _____ day of _______________, 1998.

[Purchaser]


By:
   ----------------------------------------
Name:
     --------------------------------------
Its:
     --------------------------------------

                                       2
<PAGE>
 

                                  SCHEDULE 1
                                  ----------
                                      TO
                                      --
                                  OSHA LETTER
                                  -----------

                                LIST OF REPORTS
                                ---------------

                                        
1.   Letter dated March 6, 1991 from Versar, Inc. addressed to Mr. Frank
     Frankini of Equity Group;

2.   Phase I - Environmental Assessment Resurvey prepared by Versar, Inc.,
     Versar Job No. 10196.001.01 dated December, 1991; and

3.   Environmental Hazard Audit prepared by Versar, Inc. dated December 9, 1988.


                                       3
<PAGE>
 

                                   EXHIBIT P

                             ENVIRONMENTAL REPORTS
                             ---------------------
                                        

1.   Letter dated March 6, 1991 from Versar, Inc. addressed to Mr. Frank
     Frankini of Equity Group;

2.   Phase I - Environmental Assessment Resurvey prepared by Versar, Inc.,
     Versar Job No. 10196.001.01 dated December, 1991; and

3.   Environmental Hazard Audit prepared by Versar, Inc. dated December 9, 1988.
<PAGE>
 

                                   EXHIBIT Q

                           CONFIDENTIALITY AGREEMENT
                           -------------------------
                                        

Exhibit Q follows this page
<PAGE>
 

                                   EXHIBIT R

           QUIT CLAIM ASSIGNMENT OF PERMITS AND GENERAL INTANGIBLES
           --------------------------------------------------------
                                        

     THIS QUIT CLAIM ASSIGNMENT OF PERMITS AND GENERAL INTANGIBLES (this
"Assignment") is entered into as of the ____ day of __________, 1998 by and
between AMERICAN NATIONAL BANK AND TRUST COMPANY OF CHICAGO, NOT PERSONALLY, BUT
SOLELY AS TRUSTEE ("Trustee") UNDER TRUST AGREEMENT DATED MARCH 14, 1991 AND
KNOWN AS TRUST NUMBER 113531-09 (the "Trust"), 1800 SHERMAN ASSOCIATES, an
Illinois general partnership ("Beneficiary"; Trust and Beneficiary are
collectively referred to herein as "Assignor"), having offices at Two North
Riverside Plaza, Chicago, Illinois 60606, and ________________, a __________
("Assignee"), with an office at ________________________________.

     1. Property. The "Property" shall mean the real property located in the
City of Evanston, County of Cook, State of Illinois, legally described in
EXHIBIT A attached to this Assignment, together with all of Assignor's right,
title and interest in and to the building, structures and other improvements
located thereon, and commonly known as "1800 Sherman".

     2. Contract. "Contract" shall mean that certain Real Estate Sale Agreement
dated _______________, 1998 by and between Assignor, as Seller, and
_________________, as Purchaser, for the purchase and sale of the Property.

     3. Permits. "Permits" shall mean all certificates of occupancy, special use
permits, elevator inspection certificates, operating permits, and all other
permits issued by any governmental authority relating to the use, occupancy,
ownership or operation of the Property, if any.

     4. General Intangibles. "General Intangibles" shall mean: (i) all
warranties and guaranties relating to the Property, (ii) all plans,
specifications and floor plans for the Office Building (as defined in the
Contract); and (iii) all existing intangible personal property pertaining to the
Property, including the name "1800 Sherman" but excluding any intangible
property pertaining in any way to the rights associated with the name "Equity
Office" or the name of any entity containing the words "Equity Office".

     5. Quit Claim Assignment. For good and valuable consideration received by
Assignor, the receipt and sufficiency of which are hereby acknowledged, Assignor
hereby quit claims to Assignee the entire right, title and interest of Assignor,
if any, in and to the Permits and General Intangibles, as applicable to the
period from and after the date hereof.

     6. Enforcement. If Assignor or Assignee must resort to a court of law or
equity in order to enforce the provisions of this Assignment as against the
other, the non-prevailing party shall pay the reasonable attorney's fees and
expenses of the prevailing party.

     7. Third Parties. Except as set forth in Section 10 of this Assignment, no
third party shall have the benefit of any of the provisions of this Assignment,
nor is this Assignment made with the intent that any person or entity other than
Assignor or Assignee shall rely hereon.

     8. No Representations or Warranties. This Assignment shall not be construed
as a representation or warranty by Assignor as to the existence, ownership or
transferability of the Permits or the General Intangibles, and Assignor shall
have no liability to Assignee in the event that any or all of the
<PAGE>
 

Permits or the General Intangibles (i) are not transferable to Assignee, or (ii)
are canceled or terminated by reason of this assignment or any acts of Assignee.

     9. Limited Liability. By accepting this Assignment, Assignee expressly
understands and agrees that any recovery against Assignor that Assignee may be
entitled to as a result of any claim, demand or cause of action that Assignee
may have against Assignor with respect to this Assignment shall only be
recoverable against Assignor as provided in Section 10(P) of the Contract.

     10. Successors and Assigns. This Assignment shall be binding upon and inure
to the benefit of the parties hereto and their respective successors and
assigns.

     11. Counterparts. This Assignment may be executed in any number of
identical counterparts, any or all of which may contain signatures of fewer than
all of the parties but all of which taken together shall constitute a single
instrument.

     12. Trustee Exculpation. This Assignment is executed by the undersigned
Trustee, not personally but solely as Trustee in the exercise of the power and
authority conferred upon and invested in it as trustee under the Trust. It is
expressly understood and agreed by all parties to this Assignment that all the
warranties, indemnities, representations, covenants, undertakings and
Assignments herein made on the part of the Trustee are undertaken by the Trustee
solely in the Trustee's capacity as Trustee and not personally. No personal
liability or personal responsibility is assumed by or shall at any time be
asserted or enforceable against such Trustee on account of any warranty,
indemnity, representation, covenant, undertaking or Assignment of the Trustee in
this Assignment.


              [THE REMAINDER OF THIS PAGE IS INTENTIONALLY BLANK]


                                       2
<PAGE>
 

             [signature page attached to Quit Claim Assignment of 
                       Permits and General Intangibles]


     IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment the
day and year first above written.

                                   TRUST:

                                   AMERICAN NATIONAL BANK AND TRUST COMPANY 
                                   OF CHICAGO, NOT PERSONALLY, BUT SOLELY AS 
                                   TRUSTEE UNDER TRUST AGREEMENT DATED 
                                   MARCH 14, 1991 AND KNOWN AS TRUST 
                                   NUMBER 113531-09

                                   By:
                                       -----------------------------------------
                                   Name:
                                         ---------------------------------------
                                   Its:
                                        ----------------------------------------


                                   BENEFICIARY:

                                   1800 SHERMAN ASSOCIATES, an Illinois general
                                   partnership

                                   By: First Capital Income and Growth Fund-
                                       Series XII, an Illinois limited
                                       partnership, a general partner

                                       By: First Capital Financial Corporation,
                                           a Florida corporation, its general
                                           partner

                                           By:
                                               ---------------------------------
                                           Name:
                                                 -------------------------------
                                           Its:
                                                --------------------------------

                                   By: First Capital Growth Fund-XIV, a Real
                                       Estate Limited Partnership, an Illinois
                                       limited partnership, a general partner

                                       By: First Capital Fund-XIV, Inc., an
                                           Illinois corporation, its general
                                           partner

                                           By:
                                               ---------------------------------
                                           Name:
                                                 -------------------------------
                                           Its:
                                                --------------------------------


                                       3
<PAGE>
 

                         ASSIGNEE:

                         PRENTISS PROPERTIES ACQUISITION PARTNERS, L.P., a
                         Delaware limited partnership

                         By: Prentiss Properties I, Inc., a Delaware
                             corporation, its general partner


                             By:
                                 -----------------------------------------------
                             Print Name:
                                         ---------------------------------------
                             Its:
                                  ----------------------------------------------



                                   EXHIBITS
                                   --------

                         A  - Legal Description of Property



                                       4
<PAGE>
 

                                   EXHIBIT S

     T.I. AND COMMISSIONS - NEW LEASES APPROVED PRIOR TO DATE OF AGREEMENT
     ---------------------------------------------------------------------

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------------
                       Date of Lease or                                               Comm. Due      Purchaser's    Seller's
     Tenant                Amendment             T.I. REference        T.I. Due      Per Invoices       Share        Share
- ----------------------------------------------------------------------------------------------------------------------------
<S>                   <C>                    <C>                       <C>           <C>             <C>            <C>
Arthur Winter, an     Second Amendment to    Paragraph IV of Second    $6,066.00     $          -    $  6,066.00    $      -
individual            Lease dated May        Amendment to Lease
                      29,1998.
- ----------------------------------------------------------------------------------------------------------------------------
Total                                                                  $6,066.00     $          -    $  6,066.00    $      -
- ----------------------------------------------------------------------------------------------------------------------------
</TABLE>
<PAGE>
 

                                   EXHIBIT T

                    T.I. AND COMMISSIONS - EXISTING LEASES
                    --------------------------------------

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------------
                     Date of Lease or                                    Comm. Due                    Purchaser's   Seller's
     Tenant             Amendment        T.I. REference    T.I. Due     Per Invoices       Total         Share       Share
- ----------------------------------------------------------------------------------------------------------------------------
<S>                <C>                   <C>              <C>           <C>             <C>           <C>           <C>
Sachs Group, Inc.  Lease dated July 29,  Paragraph 9 of   $275,526.00   $          -    $275,526.00   $275,526.00   $      -
individual         1994                  Exhibit E (1)
- ----------------------------------------------------------------------------------------------------------------------------
Total                                                     $275,526.00   $          -    $275,526.00   $275,526.00   $      -
- ----------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
(1) Pursuant to Paragraph IV.D. of the First Amendment dated August 2, 1995 the
    Refurbishment Allowance was reduced to $275,526.00
<PAGE>
 
                                   EXHIBIT U

     SETTLEMENT OF ASSESSED VALUES -- APPLICABLE TAX AND/OR CALENDAR YEARS
     ---------------------------------------------------------------------


1.  Calendar Year 1995 (taxes payable in 1996)
2.  Calendar Year 1996 (taxes payable in 1997)
3.  Calendar Year 1997 (taxes payable in 1998)

<PAGE>
 
                                   EXHIBIT V
                                        
                             SURVEY CERTIFICATION
                             --------------------


TO:



The undersigned hereby certifies that (a) this survey (i) is true and correct,
(ii) was made on the ground under my supervision, and (iii) correctly shows the
boundary lines and dimensions and area of the land indicated hereon and each
individual parcel thereof indicated hereon; (b) this survey correctly shows the
location and dimensions of all alleys, streets, roads, rights-of-way, easements,
building setback lines and other matters of record (as set forth in the
commitment for title insurance provided to the undersigned) affecting the
subject property according to the legal descriptions in such easements and other
matters (with instrument, volume and page numbers indicated hereon); (c) except
as shown hereon, there are no (i) visible improvements, visible easements,
rights-of-way, party walls, visible uses, visible discrepancies or conflicts,
(ii) visible encroachments on adjoining premises, streets or alleys by any of
said buildings, structures or other improvements, (iii) visible encroachments on
the subject property by buildings, structures or other improvements situated on
adjoining premises, or (iv) encroachments on any easement, building setback line
or other restricted area (shown in the title commitment) by any buildings,
structures or other improvements situated on the subject property; (d) the
distance from the nearest intersecting street or road is as shown hereon; (e)
the subject property has direct and free access to ____________________________,
a dedicated public street or road as shown hereon; (f) the subject property is
located within an area having a Zone Designation ___ by the Federal Emergency
Management Agency (FEMA), on Flood Insurance Rate Map No. ____, with an
effective date of ______________________, for Community No. ____, in the City of
__________________ ______________________, ____________________ County,
_____________________, which is the current published Flood Insurance Rate Map
for the community in which the subject property is located; and (g) except as
shown hereon, the subject property does not serve any adjoining property for
drainage, ingress and egress or any other purpose.

The property described hereon is the same as the property described in [describe
Title Commitment], and all easements, covenants and restrictions referenced in
said Title Commitment or apparent from a physical inspection of the site or
otherwise known to me have been plotted hereon or otherwise noted as to their
effect on the subject property.

I hereby certify that this survey was made in accordance with the "Minimum
Standard Detail Requirements for ALTA/ACSM Land Title Surveys," jointly
established and adopted by ALTA and ACSM in 1992, and meets the accuracy
requirements of an Urban Survey, as defined therein, and including Items 1-4,
and 6 (only as shown in the title commitment)-11, and 13 in Table A contained
therein.

<PAGE>
 
                                   EXHIBIT W
                                        
                            LEASE DEFAULTS - SELLER
                            -----------------------

None.

<PAGE>
 
                                   EXHIBIT X
                                        
                                 AUDIT LETTER
                                 ------------


[Purchaser's Auditor]

- --------------------- 

- --------------------- 
 

Dear Sirs:

     We are writing at your request to confirm our understanding that your audit
of the statement of operating income for the year ended _________________,
199__, was made for the purpose of expressing an opinion as to whether the
statement of operating income presents fairly, in all material respects, the
results of operations of 1800 Sherman Street, Evanston, Illinois (the "Project")
in conformity with generally accepted accounting principles. These
representations are made exclusively to [Auditor] and not to the buyer of the
Project or to any other party. In connection with your _________________, 199__
audit, we confirm, to the best of our knowledge and belief, with respect to our
daily operations and without independent investigation or inquiry, the following
representations made during your audit:

1.   We have made available to you, through our managing agent, Equity Office
     Properties Management Corp., all material financial records and related
     data concerning this Project, which are in our possession.

2.   We are not aware of any:

     a. Irregularities involving any member of management or employees that
        could have a materially adverse effect on the statement of operating
        income.

     b. Notices of violations of laws or regulations, the effect of which should
        be considered for disclosure in the financial statements or as a basis
        for recording a loss contingency.

     c. Material liabilities, gain or loss contingencies or other transactions
        (including oral and written guarantees) that are required to be but have
        not been accrued or disclosed.

     d. Material events that have occurred subsequent to _______________, 199__
        that would require material adjustment to the statement of operating
        income.

3.   The Company has complied with all material aspects of contractual
     agreements relating to the Project (e.g. management contracts) that would
     have a material effect on the statement of operating income in the event of
     noncompliance.

4.   All significant payments to affiliated companies of the undersigned have
     been properly recorded or disclosed in the financial statements that you
     have prepared and furnished to us for review.


                                       By:_______________________________

<PAGE>
 
                                   EXHIBIT Y
                                        
                          1998 TAX APPEAL SUBMISSIONS
                          ---------------------------


Exhibit Y follows this page.



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