PAINE WEBBER INCOME PROPERTIES SIX LTD PARTNERSHIP
8-K, 1999-10-13
REAL ESTATE
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                      SECURITIES AND EXCHANGE COMMISSION

                             Washington, DC  20549


                                   Form 8-K

                                CURRENT REPORT



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



       Date of Report (Date of earliest event reported) September 30, 1999
                                                        ------------------


             PAINE WEBBER INCOME PROPERTIES SIX LIMITED PARTNERSHIP
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)


     Delaware                         0-13129                   04-2829686
- --------------------------------------------------------------------------------
(State or other jurisdiction)      (Commission                (IRS Employer
    of incorporation                File Number)            Identification No.)



265 Franklin Street, Boston, Massachusetts                            02110
- --------------------------------------------------------------------------------
(Address of principal executive offices)                            (Zip Code)



Registrant's telephone number, including area code (617) 439-8118


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

<PAGE>


                                    FORM 8-K
                                 CURRENT REPORT

             PAINE WEBBER INCOME PROPERTIES SIX LIMITED PARTNERSHIP

ITEM 2 - Disposition of Assets

   Regent's Walk Apartments - Overland Park, Kansas

   Disposition Date - September 30, 1999

      On September 30, 1999, Regent's Walk Associates,  a joint venture in which
the Partnership has an interest,  sold its operating  investment  property,  the
Regent's Walk Apartments,  located in Overland Park,  Kansas, to an affiliate of
its  unaffiliated  joint venture partner for $17.75 million.  The sale generated
net  proceeds  of  approximately   $8,068,000,   after  the  assumption  of  the
outstanding first mortgage loan of approximately $8,624,000, accrued interest of
approximately $51,000,  closing proration adjustments of approximately $189,000,
and a payment of  approximately  $818,000  to the  Partnership's  non-affiliated
co-venture  partner  for its share of the net  proceeds in  accordance  with the
terms of the joint venture agreement.  In addition,  as a result of the Regent's
Walk sale, the  Partnership  received  $117,000 which had been held in escrow at
the property plus $233,000 as a result of operations of the property through the
date of sale. The  Partnership  will make a special  distribution to the Limited
Partners of $9,180,000,  or $153 per original $1,000 investment,  on October 15,
1999 to  Unitholders  of record on the  September  30,  1999 sale  date.  Of the
$153.00 total, $140.30 results from the sale of Regent's Walk and $12.70 is from
Partnership reserves that exceed expected future requirements.

      As previously reported, the Partnership entered into negotiations with its
Regent's Walk  Apartments  co-venture  partner for a sale of the property during
the third quarter of fiscal 1999. On May 19, 1999, the Partnership  negotiated a
purchase and sale  agreement  with an affiliate of the  co-venturer  to sell the
property  for  what  the  Partnership  believes  was a very  favorable  price of
$17,750,000.  The prospective buyer  subsequently made  non-refundable  deposits
totalling $1,250,000. The only contingency was for approval by the lender for an
assumption of the first mortgage loan as part of the sale transaction. The joint
venture subsequently received this approval and the sale closed on September 30,
1999.

      As previously  reported,  the  Partnership  has been focusing on potential
near-term  disposition  strategies for Regent's Walk Apartments and Mall Corners
Shopping  Center,  its two remaining  real estate  investments.  As part of that
plan, the Partnership has sold the Regent's Walk Apartments to its  unaffiliated
joint venture partner. As reported in the Partnership's Quarterly Report on Form
10-Q for the quarter ended June 30, 1999, the  Partnership  continues to explore
its strategic  alternatives  for the Mall Corners  investment.  The  Partnership
previously  reported  that  although  no  assurances  could  be  given,  it  was
contemplated  that a  liquidation  of the  Partnership  could  be  completed  by
calendar year-end 1999.  However,  because of the recently  announced closing of
Upton's,  an anchor tenant at Mall Corners,  as well as other current vacancies,
the Partnership's joint venture partner believes that it could be desirable from
its  perspective  to re-lease  all of the  currently  vacant space at the Center
before selling the property.  The  Partnership is still  exploring its strategic
alternatives  which include exercising its rights of first offer under the joint
venture  agreement.  As a  result,  it is  unlikely  that a  liquidation  of the
Partnership can be completed by the end of calendar year 1999.

ITEM 7 - Financial Statements and Exhibits

   (a)   Financial Statements:  None

   (b)   Exhibits:

     (1)  Purchase and Sale  Agreement by and among  Regent's  Walk  Associates,
          Peterson Interests Of Kansas,  Inc. and Paine Webber Income Properties
          Six Limited Partnership, dated May 19, 1999.



<PAGE>



                                    FORM 8-K

                                 CURRENT REPORT

              PAINEWEBBER INCOME PROPERTIES SIX LIMITED PARTNERSHIP



     (2)  Escrow  Agreement  by and among  Regent's  Walk  Associates,  Peterson
          Interests Of Kansas,  Inc., Paine Webber Income Properties Six Limited
          Partnership, and Goodwin, Procter and Hoar, LLP, dated May 19, 1999.

     (3)  Amendment to Purchase and Sale  Agreement by and among  Regent's  Walk
          Associates, Peterson Interests Of Kansas, Inc. and Paine Webber Income
          Properties Six Limited Partnership, dated September 2, 1999.

     (4)  Document  Escrow  Agreement  by and among  Regent's  Walk  Associates,
          Peterson Interests Of Kansas, Inc., Paine Webber Income Properties Six
          Limited  Partnership,  and  Goodwin,  Procter  and  Hoar,  LLP,  dated
          September 2, 1999.

     (5)  Kansas  Quit-Claim  Deed  by and  between  Regent's  Walk  Associates,
          Peterson Interests Of Kansas,  Inc. and Paine Webber Income Properties
          Six Limited Partnership, dated September 30, 1999.

     (6)  Bill of  Sale  by  Regent's  Walk  Associates  in  favor  of  Peterson
          Interests Of Kansas, Inc, dated September 30, 1999.

     (7)  Assignment  and  Assumption  of Leases and Security  Deposits  between
          Regent's Walk Associates and Peterson Interests Of Kansas, Inc., dated
          September 30, 1999.

     (8)  Assignment   and  Assumption  of  Contracts   between   Regent's  Walk
          Associates and Peterson Interests Of Kansas, Inc., dated September 30,
          1999.

     (9)  Seller's  Settlement  Statement  between  Regent's Walk Associates and
          Peterson Interests Of Kansas, Inc, dated September 30, 1999.



<PAGE>


                                    FORM 8-K

                                 CURRENT REPORT

             PAINE WEBBER INCOME PROPERTIES SIX LIMITED PARTNERSHIP




                                   SIGNATURES



      Pursuant to the  requirements  of the Securities and Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned thereunto duly authorized.

             PAINE WEBBER INCOME PROPERTIES SIX LIMITED PARTNERSHIP
             ------------------------------------------------------
                                  (Registrant)


                     By: Sixth Income Properties Fund, Inc.



                              By: /s/ Walter V. Arnold
                                  --------------------
                                  Walter V. Arnold
                                  Senior Vice President and
                                  Chief Financial Officer







Date:  October 13, 1999


<PAGE>


                          PURCHASE AND SALE AGREEMENT


      THIS PURCHASE AND SALE AGREEMENT  (this  Agreement) is dated as of May 19,
1999, by and among REGENTS WALK ASSOCIATES,  a Kansas general partnership having
an address c/o PaineWebber Properties,  Incorporated, 265 Franklin Street - 15th
Floor,  Boston, MA 02110 (Seller),  PETERSON INTERESTS OF KANSAS, INC., a Kansas
corporation  having an address at 10000 West 75th Street,  Shawnee  Mission,  KS
66204 (Purchaser),  and PAINEWEBBER INCOME PROPERTIES SIX LIMITED PARTNERSHIP, a
Delaware  limited  partnership  having an address  c/o  PaineWebber  Properties,
Incorporated, 265 Franklin Street - 15th Floor, Boston, MA 02110 (PWIP6).

                             W I T N E S S E T H :

      WHEREAS,  PWIP6 and Purchaser  are the sole partners of Seller,  which was
formed pursuant to that certain Partnership Agreement dated as of April 25, 1985
between Purchaser and PWIP6 (the Partnership Agreement); and

      WHEREAS,  Seller is the  owner of  certain  improved  real  property  (the
Premises) known as The Regents Walk Apartments located in Overland Park, Kansas,
which  real  property  is  more  particularly  described  in  the  Mortgage  (as
hereinafter defined); and

      WHEREAS,  Seller  desires to sell to Purchaser,  and Purchaser  desires to
purchase from Seller, the Premises on the terms and conditions set forth in this
Agreement.

      NOW,  THEREFORE,  in consideration of Ten ($10.00) Dollars,  each party to
the other in hand paid, and in further consideration of the mutual covenants and
agreements hereinafter set forth, the receipt and sufficiency of which is hereby
acknowledged, Seller and Purchaser agree as follows:

                  ARTICLE 1.  AGREEMENT TO SELL AND PURCHASE.

      1.1. Sale. Seller hereby agrees to sell to Purchaser, and Purchaser hereby
agrees to purchase from Seller,  at the price and upon the terms and  conditions
set forth in this Agreement, the Premises.

      1.2. Matters to Which the Sale Is Subject. The Premises are to be sold and
are to be conveyed by Seller and  accepted by  Purchaser  subject to all matters
affecting the Premises, whether or not of record, including without limitation:

            (a) Any state of facts that a survey of the Premises brought down to
      the Closing (as hereinafter defined) would actually disclose;

            (b)  All  title  matters,  encroachments,  covenants,  restrictions,
      easements,  reservations and agreements affecting the Premises, whether or
      not of record;

            (c)  All  leases,  licenses,   occupancy  agreements  (collectively,
      Leases) and the rights of parties in possession affecting the Premises;

            (d)  Any  and  all  laws,   statutes,   ordinances,   codes,  rules,
      regulations,   requirements,  or  executive  mandates  including,  without
      limitation,   all   environmental,   building  and  zoning   restrictions,
      ordinances and  regulations,  affecting the Premises adopted by the United
      States,  the State of Kansas,  the  municipality of Overland Park, and any
      and  every  other  agency,  department,  commission,  rule-inducing  body,
      bureau,  instrumentality  and/or  political  subdivision  of government of
      every kind  whatsoever  having  jurisdiction  thereof  (each a  Government
      Entity),  and all  amendments or additions  thereto now in effect or which
      may be in force and effect at the time of the Closing (collectively Laws);

            (e) Rights,  if any,  so far as the same may be of present  force or
      effect, in favor of any public or quasi-public  utility company,  provided
      that Seller  shall not grant any such right after the date hereof  without
      Purchasers  consent,  which consent shall not be unreasonably  withheld or
      delayed;

            (f) Any and all special assessments, assessments for improvements or
      any other  assessment or charge of any kind becoming  liens  subsequent to
      the date hereof or which are  presently a lien but are not due and payable
      until after the Closing (as hereinafter defined);

            (g) Unpaid real estate taxes, water and sewer charges; and

            (h)   The Existing Mortgage Loan.

      1.3.  Seller's  Limited   Representation.   Seller  hereby  represents  to
Purchaser  that PWIP6 has not entered into any  agreement on behalf of Seller or
created  any  matter  on behalf  of  Seller  which (a) is not of record  and (b)
Purchaser did or does not have knowledge and (c) would be binding upon Purchaser
or the  Premises  following  the Closing  (as  hereinafter  defined);  provided,
however,  that Purchaser  shall not be entitled to pursue a claim against Seller
for any breach of the representation set forth in this Section 1.3 to the extent
that the subject matter  thereof is covered under any policy of title  insurance
held by Purchaser. This representation shall survive the Closing for a period of
sixty (60) days. Seller's representation in this Section 1.3 shall not accrue to
the benefit of any title insurer (by subrogation, assignment or otherwise).

                     ARTICLE 2.  PURCHASE PRICE; DEPOSIT.

      2.1. Purchase Price. The purchase price (the Purchase Price) to be paid by
Purchaser to Seller for the Premises is Seventeen  Million  Seven  Hundred Fifty
Thousand Dollars ($17,750,000.00). The Purchase Price to be paid by Purchaser to
Seller for the Premises shall be paid as follows:

            (a)  Five  Hundred  Thousand  Dollars   ($500,000.00)  (the  Initial
      Deposit)  simultaneously with the execution by Purchaser of this Agreement
      by one or more wire transfers of immediately  available  funds to Goodwin,
      Procter & Hoar LLP,  escrowee  (Escrow Agent) pursuant to a certain Escrow
      Agreement (the Escrow  Agreement) dated of even date herewith by and among
      Seller, Purchaser and Escrow Agent (failure of Escrow Agent to receive the
      Initial  Deposit in due course  will give  Seller the option of  canceling
      this Agreement); and

            (b)   Seventeen   Million  Two  Hundred   Fifty   Thousand   Dollars
      ($17,250,000.00)  by one or more wire transfers of  immediately  available
      federal funds to Seller and other parties, if any, designated by Seller at
      Closing (as  hereinafter  defined).  The Closing  shall be  adjourned,  if
      necessary, to permit confirmation that the wire transfer of the balance of
      the Purchase Price has been received by Seller and other parties,  if any,
      designated by Seller.

      2.2. Escrow. The Initial Deposit,  the Additional Deposits (as hereinafter
defined),  to the extent  received by Escrow  Agent,  and all  interest  accrued
thereon  shall be held and  disbursed  by Escrow  Agent  pursuant  to the terms,
covenants,  conditions  and  provisions  of the Escrow  Agreement.  The  Initial
Deposit  and  the  Additional  Deposits  are  collectively  referred  to as  the
Deposits.

      2.3. Apportionments. The following items shall be apportioned and adjusted
between  Seller and Purchaser as of 11:59 p.m. on and as of the day prior to the
Closing Date:

            (a) Tax  Proration.  All due and  payable  real  estate  taxes,  all
      general and special  assessments on the land and ad valorem taxes, if any,
      on the personal  property (based on the most recent  ascertainable  taxes)
      attributable  to the  Premises  through the Closing Date shall be prorated
      and adjusted.  If the tax  statements for the fiscal year during which the
      Closing Date occurs are not finally  determined,  then the tax figures for
      the  immediately  prior  fiscal  year  shall be used for the  purposes  of
      prorating taxes on the Closing Date, and at such time as the actual amount
      of taxes for the  current  fiscal  year are known,  Seller  and  Purchaser
      shall, if required, readjust the amounts to be paid by each party. Any tax
      refunds or proceeds (including interest thereon) on account of a favorable
      determination  resulting  from a  challenge,  protest,  appeal or  similar
      proceeding relating to taxes and assessments  relating to the Premises (i)
      for all tax periods  occurring prior to the applicable tax period in which
      the Closing  occurs shall be deemed  retained by and paid  exclusively  to
      Seller and thereafter  remitted as provided in the  Partnership  Agreement
      and (ii) for the  applicable  tax period in which the Closing occurs shall
      be  prorated as of the  Closing  Date such that Seller  shall be deemed to
      retain and be paid that  portion of such tax  refunds  or  proceeds  as is
      applicable  to the  portion  of the  applicable  tax  period  prior to the
      Closing  Date and  Purchaser  shall be deemed  to retain  and be paid that
      portion of such tax refunds or proceeds as is applicable to the portion of
      the applicable tax period from and after the Closing Date. Purchaser shall
      not settle any tax  protests  or  proceedings  in which  taxes for the tax
      period  prior to Closing  are being  adjudicated  without  the  consent of
      Seller (which  obligation shall survive the Closing),  which consent shall
      not be unreasonably withheld, conditioned or delayed.

            (b) Contract Proration.  All (a) prepaid or past due amounts and (b)
      prepaid  fees or bonuses  under any  service,  supply,  equipment  rental,
      management,  operating and leasing contracts  affecting the Premises shall
      be prorated and adjusted.

            (c)  Utility  Proration.  All  prepaid  and  past  due  charges  for
      electricity,  gas,  water,  sewer or  other  public  utility  usage at the
      Premises shall be prorated and adjusted; provided, however, that if and to
      the extent such charges are paid directly by tenants,  no such  adjustment
      or  proration  shall be  required.  To  facilitate  such  adjustments  and
      prorations,  Purchaser shall cause all meters for electricity, gas, water,
      sewer or other public  utility  usage at the Premises to be read as of the
      day immediately preceding the Closing Date; provided, however, that if and
      to the extent such charges are paid  directly by tenants,  no such reading
      shall be required.  If the utility  companies are unable or refuse to read
      meters for which adjustment or proration is required, all charges for such
      utilities  to the extent  unpaid  shall be prorated and adjusted as of the
      Closing  Date  based on the most  recent  bills  therefor  and no  further
      adjustment shall be made.

            (d)  Income  and  Expense  Proration.  Rents and all other  items of
      income and all expenses and other charges in connection with the operation
      of the  Premises  shall be  apportioned  and adjusted  between  Seller and
      Purchaser.

            (e)  Prorations  Generally.  A  statement  of  prorations  and other
      adjustments  shall  be  prepared  by  Purchaser  in  conformity  with  the
      provisions of this Section and submitted to Seller for review and approval
      not less than three (3) business  days prior to the Closing  Date.  Seller
      and Purchaser agree to adjust between  themselves after Closing any errors
      or omissions  in the  prorations  or  adjustments  made at Closing,  which
      obligation shall survive the Closing for a period of six (6) months.

                 ARTICLE 3.  THE CLOSING; STRUCTURING PERIOD.

      3.1.  Closing.  The payment of the balance of the  Purchase  Price and the
transfer of title to the Premises (the Closing)  shall be held in the offices of
Seller's  attorneys,  Goodwin,  Procter & Hoar LLP,  Exchange Place,  Boston, MA
02109,  or at such other place as the parties  shall agree in writing,  at 10:00
a.m. on July 7, 1999 (the Closing Date); provided, however, that Purchaser shall
have a one-time  right to extend the  originally  scheduled  Closing  Date for a
period not to exceed  thirty (30) days by (i)  delivering to Seller on or before
June 29, 1999  written  notice  exercising  such right to extend the  originally
scheduled  Closing  Date and setting  forth the new Closing Date which must be a
business day not more than thirty (30) days following the  originally  scheduled
Closing Date (the First  Extended  Closing  Date) and (ii)  delivering to Escrow
Agent  on or  before  the  date  that is five  (5)  business  days  prior to the
originally  scheduled  Closing Date an additional  deposit (the First  Extension
Additional  Deposit)  in  the  amount  of Two  Hundred  Fifty  Thousand  Dollars
($250,000.00) by one or more wire transfers of immediately  available funds; and
further provided that if Purchaser shall have extended the originally  scheduled
Closing Date to the First Extended Closing Date, Purchaser shall have a one-time
right to further  extend the Closing Date from the First  Extended  Closing Date
for a period not to exceed  thirty (30) days by (i)  delivering  to Seller on or
before  the date that is five (5)  business  days  prior to the  First  Extended
Closing Date written  notice  exercising  such right to extend  Closing Date and
setting  forth the new Closing  Date which must be a business  day not more than
thirty (30) days following the First Extended  Closing Date (the Second Extended
Closing Date) and (ii)  delivering to Escrow Agent on or before the date that is
five (5) business  days prior to the First  Extended  Closing Date an additional
deposit (the Second Extension  Additional  Deposit) in the amount of Two Hundred
Fifty  Thousand  Dollars   ($250,000.00)  by  one  or  more  wire  transfers  of
immediately available funds. Purchaser shall have no right to extend the Closing
Date beyond the Second  Extended  Closing Date. The First  Extension  Additional
Deposit  and  the  Second  Extension  Additional  Deposit   (collectively,   the
Additional  Deposits)  shall be held and  disbursed  in the same  manner  as the
Initial Deposit  pursuant to the Escrow  Agreement.  If (A) Purchaser shall have
extended the originally  scheduled  Closing Date to the First  Extended  Closing
Date and shall have timely delivered the First Extension Additional Deposit, the
balance of the Purchase Price due at Closing shall be Seventeen  Million Dollars
($17,000,000.00)  and (B) Purchaser  shall have extended the originally  Closing
Date from the First Extended  Closing Date to the Second  Extended  Closing Date
and shall have timely delivered the First Extension  Additional  Deposit and the
Second Extension  Additional  Deposit,  the balance of the Purchase Price due at
Closing  shall  be  Sixteen   Million  Seven  Hundred  Fifty  Thousand   Dollars
($16,750,000.00).

      3.2.  Closing Costs.

            (a)  Seller  shall pay its legal  fees and  expenses  related to the
      negotiation and  preparation of this Agreement and all documents  required
      to close the transaction contemplated hereby.

            (b)  Purchaser  shall pay:  (i)  Purchasers  legal fees and expenses
      related to the negotiation of this Agreement and all documents required to
      close the transaction contemplated hereby; (ii) all state and county taxes
      associated  with  the  transfer  of  the  Premises   (including,   without
      limitation  transfer  taxes on stamps),  if any;  (iii) all costs and fees
      associated with soliciting and obtaining  Lenders approval of the sale and
      purchase of the Premises and the Seller Release  Documents (as hereinafter
      defined); and (iv) the cost of any title insurance.

            (c) All other  closing costs shall be paid by Seller or Purchaser in
      accordance  with  the  other  provisions  of  this  Agreement  or,  if not
      addressed herein, in accordance with the custom in the jurisdiction of the
      Controlling Law.

      3.3. Structuring Period.  Purchaser shall have a period of time commencing
on the date hereof and ending on May 28, 1999 (the Structuring Period Expiration
Date) to (a) arrange the capital  structure for  Purchasers  acquisition  of the
Premises and (b) confirm that Purchaser  shall be able to obtain title insurance
for an insured amount equal to the Purchase Price insuring title to the Premises
subject to all matters  affecting  the  Premises  set forth in Section  1.2. If,
notwithstanding  Purchasers diligent efforts, Purchaser is unable to arrange the
capital  structure  for  its  acquisition  of  the  Premises  on or  before  the
Structuring  Period  Expiration Date or is unable to confirm the availability of
title insurance as  contemplated  in clause (b) of the preceding  sentence on or
before the Structuring Period Expiration Date, Purchaser shall have the right to
terminate  this  Agreement  by delivery of written  notice sent by  Purchaser to
Seller  any time  prior to 5:00 p.m.  (Boston  time) on the  Structuring  Period
Expiration Date (for purposes of Purchasers termination notice only, such notice
may  be  sent  to  Seller's  counsel  listed  in  Article  10 via  facsimile  at
617-227-8591,  followed by a duplicate  notice mailed the same day via certified
mail, return receipt requested,  or by  nationally-recognized  overnight courier
(with airbill  evidencing  date of shipping) in accordance  with Section  10.1).
Upon  receipt of such  notice by Seller (or,  if sent by  Purchaser  to Seller's
counsel in accordance with the preceding  sentence,  upon sending of such notice
by  Purchaser to Seller)  prior to 5:00 p.m.  (Boston  time) on the  Structuring
Period  Expiration Date, this Agreement shall terminate and Purchaser shall have
the right to receive refund of the Deposits and all interest accrued thereon. If
Purchaser  fails to terminate  this  Agreement by notice to Seller prior to 5:00
p.m. (Boston time) on the Structuring  Period  Expiration Date,  Purchaser shall
have no further right to terminate this Agreement pursuant to this Section 3.3.

                       ARTICLE 4.  CLOSING OBLIGATIONS.

      4.1.  Seller's  Obligations.  At the  Closing,  Seller  shall  deliver the
following to Purchaser:

            (a) A quitclaim deed (without covenants) (the Deed);

            (b) A  quitclaim  bill  of  sale  and  general  assignment  (without
      representations  or covenants)  conveying all of the (i) personal property
      owned by Seller and installed,  located at and used in connection with the
      ownership,  occupation  and operation of the Premises and (ii)  intangible
      assets  owned by  Seller  relating  solely  to the  Premises,  in the form
      attached hereto as Exhibit 1;

            (c) An assignment and assumption of the Leases and security deposits
      (the  Assignment and Assumption of Leases) in the form attached hereto and
      Exhibit 2;

            (d) An assignment and assumption of all service,  supply,  equipment
      rental, management,  operating,  leasing and other contracts affecting the
      Property,  to the extent that  Seller is entitled to transfer  the same to
      Purchaser  (the  Assignment  and  Assumption  of  Contracts)  in the  form
      attached hereto and Exhibit 3;

            (e) The form  attached  hereto  as  Exhibit 4 titled  Disclosure  of
      Information  on  Lead-Based  Paint and/or  Lead-Based  Paint  Hazards duly
      executed by Seller; and

            (f) A duly executed  counterpart  original of the closing  statement
      setting  forth  the  Purchase  Price,  the  closing  adjustments  and  the
      application of such amounts;

            (g) An affidavit  for the benefit of  Purchasers  title insurer with
      respect to parties-in-possession and mechanics liens at the Premises; and

            (h) Any other  documents  required by this Agreement to be delivered
      by Seller at the Closing or otherwise  reasonably  required to  effectuate
      the transactions contemplated herein.

      4.2.  Purchasers Obligations.  At the Closing, Purchaser shall:

            (a)  Deliver to Seller the balance of the Purchase Price payable at
      the Closing;

            (b) If Seller,  PWIP6 or any of PWIP6's  affiliates  are  personally
      liable  under  any  guaranties  or  other   financial   undertakings   for
      obligations of Seller (Seller's Recourse Liability),  then Purchaser shall
      either  obtain the release of the Seller's  Recourse  Liability  (and,  if
      required  in  order  to do so,  shall  substitute  acceptable  guaranties,
      letters of credit or other  financial  undertakings  in exchange  for such
      release)  or,  if the  obligee  will not  agree to  release  the  Seller's
      Recourse Liability, then Purchaser shall deliver instrument(s) in form and
      substance and from one or more parties satisfactory to Seller whereby such
      parties agree to protect, defend, indemnify and hold Seller, PWIP6 and its
      affiliates  harmless from any liability  arising out of or relating to the
      Seller's Recourse Liability; and

            (c) The Assignment and Assumption of Leases;

            (d) The Assignment of and Assumption of Contracts;

            (e) A duly executed  counterpart  original of the closing  statement
      setting  forth  the  Purchase  Price,  the  closing  adjustments  and  the
      application of such amounts;

            (f) All documents  reasonably  required to effect the assignment and
      assumption  of  the  Existing  Loan  in  form  and  substance   reasonably
      acceptable to the parties and to Lender;

            (g) The form  attached  hereto  as  Exhibit 4 titled  Disclosure  of
      Information  on  Lead-Based  Paint and/or  Lead-Based  Paint  Hazards duly
      executed by Purchaser (Purchaser acknowledges and agrees that it has had a
      mutually-agreed  upon period to conduct a risk assessment or inspection of
      the Premises for the presence of lead-based paint and/or  lead-based paint
      hazards); and

            (h)  Execute  and  deliver  any  other  document  required  by  this
      Agreement  to be  delivered  by  Purchaser  at the  Closing  or  otherwise
      reasonably required to effectuate the transactions contemplated herein.

                ARTICLE 5.  AS IS SALE; ENVIRONMENTAL MATTERS.

      5.1. As Is Sale. Purchaser is a general partner of Seller and acknowledges
that (a) it is familiar  with the physical  condition and state of repair of the
Premises,  (b) it is familiar with the business and affairs of the  Partnership,
and (c) it is  purchasing  the  Premises  in its present  condition  as is. This
Agreement,  as written,  contains all the terms of the  agreements  entered into
between the  parties as of the date  hereof,  and  Purchaser  acknowledges  that
neither  Seller  nor  any  agent  or  representative  of  Seller  has  made  any
representations, nor held out any inducements to Purchaser, other than those, if
any,  herein  expressed.  Without  limiting  the  generality  of the  foregoing,
Purchaser acknowledges that it has not relied on any representations  (except as
set forth in Section 1.3, if  applicable),  covenants or warranties,  and Seller
(or any of its agents or representatives) has not and is not willing to make any
representations,  covenants or warranties, whether express or implied as to: (i)
the current or future real estate tax liability,  assessment or valuation of the
Premises;  (ii) the  potential  qualification  of the  Premises  for any and all
benefits conferred by any Laws,  whether for subsidies,  special real estate tax
treatment,  insurance,  mortgages,  or any other  benefits,  whether  similar or
dissimilar to those  enumerated;  (iii) the  compliance of the Premises,  in its
current  or any  future  state,  with  applicable  zoning  ordinances;  (iv) the
availability of any financing for the purchase,  development or operation of the
Premises  from any  source  whatsoever;  (v) the  present  and  future  physical
condition of the Premises or its  suitability  for development or any particular
use; (vi) the presence of any Hazardous  Substances (as hereinafter  defined) on
the Premises  and/or the  compliance of the  Premises,  in its current or future
state, with any environmental Laws; or (vii) the compliance by the Premises with
any  other  Laws  issued  or  promulgated  by any  Governmental  Entity  and any
violations thereof.

      5.2. Set-Ups;  Acceptance.  Seller is not liable or bound in any manner by
any verbal or written information pertaining to the Premises furnished by Seller
or Seller's  representatives,  any real estate broker, agent, employee, or other
person. All oral or written prior statements,  representations,  or promises, if
any, and all prior  negotiations and agreements are superseded by this Agreement
and merged herein. No provision,  covenant or representation of Seller contained
in this contract shall survive the Closing except as may be otherwise  expressly
provided  herein.  Acceptance of the Deed shall be an acceptance by Purchaser of
all of the  obligations  of Seller  hereunder  except  such as may be  expressly
required to survive the Closing under this  Agreement or which by their terms as
described in this Agreement are to be performed after the Closing.

      5.3.  Environmental.  Purchaser  acknowledges  that (i) the  Premises,  or
adjacent or neighboring lands, may have been used by present or prior owners for
manufacturing and other commercial uses which may have involved the use, storage
and transport of Hazardous  Substances (as hereinafter  defined),  and (ii) as a
result  of  such  uses  and  activities,  Hazardous  Substances  may  have  been
discharged on, into or from the Premises. For purposes of this Section, the term
Hazardous  Substances  shall  include,  without  limitation:  (a)  any  element,
compound  or chemical  that is  defined,  listed or  otherwise  classified  as a
pollutant,  toxic  pollutant,  toxic or hazardous  substance,  hazardous  waste,
special waste, extremely hazardous substance or chemical under any environmental
Laws; (b) petroleum and its refined products,  petroleum-derived  substances and
drilling  fluids,  production  waters  and  other  wastes  associated  with  the
exploration,  development  or  production  of crude oil or natural  gas; (c) any
electrical  equipment  containing  oil that contains  polychlorinated  biphenyls
(PCBs); (d) any flammable substances,  explosives or radioactive materials;  and
(e)  any raw  materials  used  or  stored  by  Purchaser,  building  components,
including,  without limitation,  asbestos-containing  materials and manufactured
products containing Hazardous Substances.

      5.4. Survival. The provisions of this Article shall survive the Closing or
any termination or cancellation of this Agreement.

                      ARTICLE 6.  EXISTING MORTGAGE LOAN.

      6.1. General.  Reference is hereby made to that certain mortgage loan (the
Existing Mortgage Loan) in the stated principal amount of $9,000,000.00 from the
Lutheran Brotherhood (Lender) to Seller. The Existing Mortgage Loan is evidenced
and/or  secured by (a) that certain  Promissory  Note in the original  principal
amount of  $9,000,000.00,  dated as of September 1, 1995 made by Seller in favor
of Lender, as amended, (b) that certain Combination Mortgage, Security Agreement
and Fixture  Financing  Statement (the  Mortgage)  dated as of September 1, 1995
between Seller and Lender, as amended, (c) that certain Assignment of Leases and
Rents  dated as of  September  1, 1995 made by Seller in favor of Lender and (d)
any and all other documents and instruments evidencing,  securing or relating to
the Existing  Mortgage Loan, all of which are  incorporated  herein by reference
(collectively,  the Existing Loan  Documents).  Purchaser  desires to assume the
payment of the outstanding principal balance of the Existing Mortgage Loan as of
the  Closing  Date (the Loan  Principal  Balance),  and the  payment of interest
accruing thereon from and after the Closing Date. If the Existing  Mortgage Loan
is not paid off and satisfied at Closing,  but is instead  assumed by Purchaser,
(a) Purchaser  shall receive a credit  against the balance of the Purchase Price
due at Closing in the amount of the Loan  Principal  Balance  and (b)  Purchaser
agrees to perform,  assume and observe all  obligations  of the Seller under the
Existing Loan Documents and the Existing Mortgage Loan.

      6.2. Lender Approval.  Immediately following the execution and delivery of
this  Agreement,  Purchaser shall solicit and thereafter  diligently  pursue (a)
Lenders  approval of the sale and purchase of the Premises and the assumption by
Purchaser of all obligations of Seller under the Existing Loan Documents and the
Existing  Mortgage  Loan and (b)  receipt  from  Lender  of the  Seller  Release
Documents (as hereinafter defined). Seller agrees to cooperate in all reasonable
respects  with  Purchasers  efforts to obtain  Lenders  approval  and the Seller
Release  Documents.  As used herein,  the term Seller  Release  Documents  means
documents  in form and  substance  reasonably  satisfactory  to Seller and PWIP6
releasing Seller, PWIP6 and any affiliate of PWIP6 from all obligations (whether
directly,  as a general partner of Seller or as a guarantor or indemnitor) under
the Existing Loan Documents  (including all environmental or hazardous substance
remediation or indemnification agreements).  Purchaser shall advise Seller as to
the status of the approval  process  from time to time  promptly  following  the
request of Seller.  Purchaser shall pay all fees and costs charged by the Lender
or otherwise  relating to the  solicitation of Lenders  approval of the sale and
purchase of the Premises and the solicitation  from Lender of the Seller Release
Documents.

      6.3.  Payoff of Existing  Mortgage Loan. In the event that Purchaser fails
to obtain and provide  Seller  with  copies of Lenders  approval of the sale and
purchase of the Premises and the Seller Release  Documents on or before the date
that is five (5) business  days prior to the scheduled  Closing  Date,  then (a)
Seller shall be required to repay in full the outstanding  principal  balance of
the Existing  Mortgage  Loan and all unpaid  accrued  interest and other charges
thereon at Closing and (b)  Purchaser  shall be  required to pay any  applicable
prepayment  premium or fee at Closing  without  reduction or  adjustment  of the
Purchase Price.

                        ARTICLE 7.  SELLER'S  REMEDIES.

      7.1. In the event of a default by Purchaser in the  performance  of any of
the terms of this  Agreement,  Seller may, in addition to Seller's  rights under
Section  7.2  hereof,  receive and retain as  liquidated  damages the  Deposits,
together with any interest thereon, for all loss, damage and expense suffered by
Seller,  including,  without  limitation,  Seller's  loss  of its  bargain,  and
thereupon  this  Agreement  shall become null and void,  and neither party shall
have further  rights  against the other,  except for those  rights  specifically
stated herein to survive the Closing or earlier  termination of this  Agreement.
Seller's  remedies under this Section 7.1 and Section 7.2 shall be Seller's sole
and exclusive remedies in the event of a default by Purchaser in the performance
of any of the terms of this  Agreement.  Seller  and  Purchaser  agree  that the
damages  resulting  to Seller as a result of such default by Purchaser as of the
date  of this  Agreement  are  difficult  or  impossible  to  ascertain  and the
liquidated  damages  set  forth in this  Section  7.1  (together  with  Seller's
remedies  under  Section 7.2)  constitute  Purchasers  and  Seller's  reasonable
estimate  of such  damages.  Notwithstanding  anything  to the  contrary  in the
Partnership Agreement or otherwise (including,  without limitation, Section 5.01
thereof),  in the event that Seller  receives  and retains all or any portion of
the Deposits following a default by Purchaser, the entire amount of the Deposits
so retained or received by Seller  shall be paid  directly  to, and retained by,
PWIP6; and Purchaser (in its capacity as a partner of Seller) hereby assigns any
and all right, title or interest in the Deposits to PWIP6.

      7.2. In the event of a default by Purchaser in the  performance  of any of
the terms of this Agreement, in addition to the remedies provided in Section 7.1
and  notwithstanding  anything  to the  contrary  contained  in the  Partnership
Agreement:

            (a) PWIP6  shall  have the  right to sell its  legal and  beneficial
      interests  in Seller  (the PWIP6  Interests)  to any third  party upon any
      terms and conditions without obtaining  Purchasers consent,  and Purchaser
      hereby  waives any rights to  purchase  the PWIP6  Interests  pursuant  to
      Section 7.02 of the Partnership Agreement;

            (b) PWIP6 shall have the right,  upon five (5) business  days notice
      to Purchaser, to purchase (or to cause any third party to purchase) all of
      Purchasers  legal  and  beneficial   interests  in  Seller  (the  Peterson
      Interests) for a price equal to the aggregate  amount that Purchaser would
      receive as liquidating  distributions from Seller pursuant to Section 5.01
      of the  Partnership  Agreement  assuming  (i) the  Premises  and the other
      noncash  assets of Seller were sold for the Purchase  Price in  accordance
      with the terms of this Agreement, (ii) all liabilities of Seller as of the
      closing  date  were  paid in full,  with  reasonable  reserves  for  those
      liabilities  of Seller which are not  reasonably  ascertainable  in amount
      (the reserves shall be  administered  and used by PWIP6 for the settlement
      and  payment  of   liabilities   of  Seller   which  are  not   reasonably
      ascertainable  as of the  closing  date,  and at such  time as  PWIP6  and
      Purchaser,  acting  collectively  and  unanimously,  determine  that  such
      reserves are no longer  required,  each acting  reasonably,  the remaining
      amount  of such  reserves  shall be  distributed  to PWIP6  and  Purchaser
      consistent  with the  provisions  of this Section 5.01 of the  Partnership
      Agreement) and (iii) the assets of Seller were  distributed and applied in
      accordance  with the terms of Section  5.01 of the  Partnership  Agreement
      (all of the foregoing calculations shall be determined by agreement of the
      parties with the assistance of the  Partnerships  accountants  or, failing
      such  agreement,   shall  be  conclusively   determined  pursuant  to  the
      provisions of Article 13 hereof);

            (c) PWIP6 shall have the right to purchase the Premises  pursuant to
      the  terms  hereof,  except  that  (i) the  Closing  Date  shall be a date
      selected  by PWIP6 not later than ninety  (90) days  following  Purchasers
      default and (ii) PWIP6 shall have no obligation to deliver a deposit or to
      pay any portion of the purchase price prior to the closing;

            (d) PWIP6 shall have the right to cause  Seller to sell the Premises
      to any unaffiliated  third party in a bona fide arms length transaction on
      any  terms  and  conditions  without  obtaining  Purchasers  consent,  and
      Purchaser  hereby (i) waives any rights to  purchase  the  Premises or the
      PWIP6  Interests  pursuant to Sections 7.03 and/or 7.04 of the Partnership
      Agreement  and (ii) any such sale  shall be deemed to be  Approved  by the
      Partners (as defined in the Partnership Agreement); and/or

            (e)  Seller  shall  have  the  right  to cause  the  Partnership  to
      terminate  any  agreements  between  the  Partnership  and  Seller  or any
      affiliate  of  Seller  (including,   without  limitation,  the  management
      agreement with Peterson Properties, Inc.).

It shall be a  condition  precedent  to any  obligation  of PWIP6  (or any third
party) to purchase the Peterson Interests or the Premises following any election
by PWIP6 pursuant to this Section 7.2 upon  receiving the prior written  consent
of the holder of the  Existing  Mortgage  Loan to the purchase by PWIP6 (or such
third party) of the Peterson Interests or the Premises,  as applicable,  without
requiring prepayment of the Existing Mortgage Loan (the Lender Consent). In such
event, Seller agrees to cooperate in all reasonable respects with PWIP6s efforts
to obtain the Lender Consent. If PWIP6 fails to receive the Lender Consent on or
before the anticipated  closing of such  transaction,  PWIP6 may elect to either
(1) extend the closing date for a  reasonable  period of time (not to exceed one
hundred twenty (120) days following the anticipated closing of such transaction)
to the extent necessary to obtain the Lender Consent,  (2) close on the purchase
of the Peterson  Interest or the Premises and prepay the Existing  Mortgage Loan
(in which  event (A) the amount to be paid by PWIP6 or such third  party for the
Peterson  Interests  shall be reduced by the reduction in the  aggregate  amount
that Seller would receive  pursuant to Section  7.2(b) if the Purchase Price was
reduced by the amount required to prepay the Existing  Mortgage Loan,  including
any  prepayment  fee or premium,  and (B) the amount to be paid by PWIP6 or such
third party for the Premises  shall be reduced by the amount  required to prepay
the Existing  Mortgage  Loan,  including any  prepayment  fee or premium) or (3)
rescind PWIP6s  election,  in which event PWIP6 (or such third party) shall have
no further obligation to purchase the Peterson Interests or the Premises.

                       ARTICLE 8.  PURCHASER'S REMEDIES.

      8.1. If Seller shall be unable to convey the  Premises,  subject to and in
accordance  with this Agreement,  or Seller  otherwise fails to comply with this
Agreement in any material respect for any reason, Purchaser shall be entitled to
a refund of the Deposits  together  with interest  earned  thereon in accordance
with the terms and conditions of the Escrow  Agreement and this Agreement.  Upon
the making of such refund,  this  Agreement  and the lien,  if any, of Purchaser
against  the  Premises  shall  wholly  cease.  Alternatively,  as  long  as  all
conditions to Seller's obligations to perform any applicable task hereunder have
been satisfied, Purchaser shall be entitled to specific performance with respect
thereto.  Notwithstanding anything to the contrary,  Purchasers recourse against
Seller  shall be  limited  to a refund of the  Deposits  or so much  thereof  as
deposited  with  Escrow  Agent  under the Escrow  Agreement  (together  with all
interest  earned thereon) or specific  performance,  and Purchaser shall have no
right to satisfy any  judgment  against  Seller from any assets of Seller  other
than the Premises.  Any claims of Purchaser at law or in equity for loss, damage
and expense suffered by Purchaser  (including,  without  limitation,  Purchasers
loss of its bargain)  following a default by Seller  hereunder are hereby waived
by Purchaser.  Any obligation of Seller  hereunder  shall be non-recourse to the
shareholders, officers, directors, and employees of Seller (and their respective
shareholders, venturers, partners, officers, directors, and employees), and such
parties shall never be personally liable for any judgments on account thereof.

      8.2. If Seller  fails to convey the Premises at Closing due to no fault of
Purchaser (either as the purchaser hereunder or as a general partner of Seller),
subject to and in accordance with this Agreement, and Purchaser elects to pursue
specific  performance  under  Section  8.1  rather  than  obtain a refund of the
Deposits under Section 8.1, then (a) Purchaser shall be entitled to have so much
of the  Deposits  then held by Escrow  Agent  returned  that would result in the
aggregate  principal  balance of the  Deposits  then held by Escrow  Agent being
reduced to One Hundred Thousand Dollars ($100,000.00) and (b) the balance of the
Purchase  Price due by Seller  at  Closing  shall be  increased  so that  Seller
receives the entire Purchase Price at Closing.

      8.3. The acceptance of the Deed by Purchaser  shall be deemed to be a full
performance  and  discharge of every  agreement  and  obligation  on the part of
Seller to be  performed  pursuant to the  provisions  of this  Agreement  except
those, if any, which are herein  specifically stated to survive the Closing Date
or which,  if any,  are required by this  Agreement  to be  performed  after the
Closing Date.


<PAGE>
                             ARTICLE 9.  BROKERS.

      9.1.  Seller and Purchaser each represent and warrant to the other that it
has not dealt with any broker or finder in connection with this Agreement or the
sale and purchase of the Premises,  and that the representing  party knows of no
broker or finder who has  claimed or may have a right to claim a  commission  or
other fee or  compensation  in  connection  with this  Agreement or the sale and
purchase of the  Premises.  Seller and  Purchaser  agree to indemnify and defend
each other against any claims, costs or expenses (including, without limitation,
Attorney's fees and commissions)  arising out of the breach, on their respective
parts,  of any  representations,  warranties  or  agreements  contained  in this
Section.  The  representations  and obligations under this Section shall survive
the  Closing  or,  if the  Closing  does  not  occur,  the  termination  of this
Agreement.
                             ARTICLE 10.  NOTICES.

      10.1.  Any notice or demand which,  under the provisions of this Agreement
or  otherwise,  must or may be given  or made by any  party  hereto,  must be in
writing and addressed as follows:

            If to Seller:

            PaineWebber Income Properties Six Limited Partnership
            c/o Paine Webber Properties, Incorporated
            265 Franklin Street - 15th Floor
            Boston, MA  02110
            Attn:  Mr. Peter Sullivan

            with a copy to:

            Goodwin, Procter & Hoar LLP
            Exchange Place
            Boston, MA  02109
            Attn:  Andrew C. Sucoff, Esq.

            If to Purchaser:

            Peterson Interests of Kansas, Inc.
            10000 West 75th Street
            Shawnee Mission, KS  66204
            Attn:  Mr. Kenneth Riedemann

            with a copy to:

            Lewis, Rice & Fingersh
            1010 Walnut, Suite 500
            Kansas City, MO  64106
            Attn:  William E. Carr, Esq.

Either party may  designate by notice in writing a new or other address to which
such notice or demand shall thereafter be so given,  made or mailed.  Any notice
shall be made as  follows:  (a)  delivered  by  United  States  Postal  Service,
registered or certified mail,  postage  prepaid;  or (c) delivered by nationally
recognized overnight courier, shipping prepaid. A notice delivered by registered
or certified mail, return receipt requested,  shall be deemed received three (3)
business days after being deposited with the United States Postal Service; and a
notice  delivered by overnight  courier shall be deemed received on the business
day following  timely  deposit with such courier for next business day delivery.
Counsel for either party may deliver notices on behalf of such party.

                    ARTICLE 11.  CASUALTY AND CONDEMNATION

      11.1. No  Termination  Right or Adjustment  of Purchase  Price.  Purchaser
shall  have no right to  terminate  this  Agreement  or receive a  reduction  or
abatement of the Purchase  Price  following  the  occurrence  of any casualty or
condemnation  affecting the Premises.  In such event,  Purchaser  shall have the
right to receive all insurance  proceeds or  condemnation  awards arising out of
such loss.

      11.2.  Uniform  Vendor and  Purchaser  Risk Act.  The  provisions  of this
Article are express provisions to the contrary and waivers of the Uniform Vendor
and Purchaser Risk Act or any similar law, to the extent  applicable and adopted
in the jurisdiction of the Controlling Law.

                        ARTICLE 12.  CLOSING CONDITIONS

      12.1.  Conditions to Seller's  Performance.  The  obligations of Seller to
sell  the  Premises  to  Purchaser  and  to  perform  the  other  covenants  and
obligations  to be  performed  by Seller on the Closing Date shall be subject to
the following conditions (all or any of which may be waived in writing, in whole
or in part, by Seller):

            (a) Purchaser  shall have performed all covenants and obligations of
      Purchaser in all respects and  complied  with all  conditions  required by
      this  Agreement to be  performed  or complied  with by it on or before the
      Closing Date;

            (b) All  instruments  and documents  required on Purchasers  part to
      effectuate  this  Agreement and the  transactions  contemplated  hereunder
      shall have been  delivered and shall be in form and  substance  reasonably
      satisfactory to Seller;

            (c) Unless the Existing  Mortgage  Loan is paid off and satisfied at
      Closing, Seller shall have received the Seller Release Documents; and

            (d) Seller shall have received  reasonable  and  customary  evidence
      that all  appropriate  organizational  action of Purchaser shall have been
      taken to authorize and effectuate the  transactions  contemplated  by this
      Agreement.

      12.2. Conditions to Purchaser's Performance.  The obligations of Purchaser
to pay the  Purchase  Price to Seller,  purchase the Premises and to perform the
other covenants and obligations to be performed by Purchaser on the Closing Date
shall be subject to the following  conditions (all or any of which may be waived
in writing, in whole or in part, by Purchaser):

            (a) Seller shall have  performed all covenants  and  obligations  of
      Seller in all respects and complied with all  conditions  required by this
      Agreement to be performed or complied  with by it on or before the Closing
      Date;

            (b) All  instruments  and  documents  required on  Seller's  part to
      effectuate  this  Agreement and the  transactions  contemplated  hereunder
      shall have been  delivered and shall be in form and  substance  reasonably
      satisfactory to Purchaser; and

            (c) Purchaser shall have received  reasonable and customary evidence
      that all appropriate organizational action of Seller shall have been taken
      to  authorize  and  effectuate  the  transactions   contemplated  by  this
      Agreement.

                      ARTICLE 13.  INTENTIONALLY OMITTED.

                          ARTICLE 14.  MISCELLANEOUS.

      14.1.  Modifications.  This  Agreement  shall  not  be  altered,  amended,
changed,  waived,  terminated or otherwise modified in any respect or particular
unless the same  shall be in writing  and signed by or on behalf of the party to
be charged therewith.

      14.2. Choice of Law; Severability. This Agreement shall be interpreted and
enforced in accordance  with the laws of the State of Kansas  without  regard to
principles of conflicts of laws (the Controlling Law). If any provisions of this
Agreement  shall be  unenforceable  or  invalid,  the same  shall not affect the
remaining  provisions of this  Agreement and to this end the  provisions of this
Agreement are intended to be and shall be severable.

      14.3. Assignment.  This Agreement may be assigned by Purchaser without the
consent of Seller;  provided,  however, that Purchaser shall give written notice
of such  assignee  to  Seller a  minimum  of ten  (10)  days  prior to  Closing.
Notwithstanding  any such  assignment,  the Purchaser  named herein shall remain
liable for all of the  representations,  covenants and  obligations of Purchaser
under this Agreement.

      14.4.  Successors and/or Assigns. This Agreement shall be binding upon and
shall inure to the benefit of the parties hereto and to their respective  heirs,
executors, administrators, successors and permitted assigns.

      14.5.  Merger;  Interpretation.  All prior  understandings  and agreements
between  the  parties  are  merged  in this  Agreement  which  alone  fully  and
completely expresses the agreement between them, and which is entered into after
full  investigation,  neither party relying upon any statement or representation
made by the  other not  embodied  in this  Agreement.  This  Agreement  shall be
construed and without regard to or aid of canons requiring  construction against
the Purchaser, Seller or party drawing this Agreement.

      14.6.  Waivers. No failure or delay of either party in the exercise of any
right given to such party  hereunder or the waiver by any party of any condition
hereunder for its benefit (unless the time specified herein for exercise of such
right, or satisfaction of such condition, has expired) shall constitute a waiver
of any other or further  right nor shall any single or partial  exercise  of any
right preclude other or further  exercise thereof or any other right. The waiver
of any breach  hereunder  shall not be deemed to be a waiver of any other or any
subsequent breach hereof.

      14.7.  Further  Assurances.  Each  party  hereto  shall  from time to time
execute,  acknowledge  and deliver  such  further  instruments  and perform such
additional  acts as the other party may  reasonably  request to  effectuate  the
intent of this Agreement.

      14.8. Schedules and Exhibits.  Each of the schedules and exhibits referred
to  herein  and  attached  hereto  is  incorporated  in this  Agreement  by this
reference as though fully set forth herein.

      14.9. Captions. The caption headings in this Agreement are for convenience
only  and are not  intended  to be a part of this  Agreement  and  shall  not be
construed to modify,  explain or alter any of the terms, covenants or conditions
herein contained.

      14.10.  Execution.  This Agreement  shall not be binding upon Seller,  and
Seller  shall  not  have  any   obligations   hereunder,   unless  and  until  a
fully-executed  original  counterpart  duly  executed  by Seller is  returned to
Purchaser  and the Initial  Deposit  has been  received  by Escrow  Agent.  This
Agreement shall not be binding upon Purchaser,  and Purchaser shall not have any
obligations  hereunder,  unless and until a fully-executed  original counterpart
duly executed by Purchaser is returned to Seller.

      14.11. No Survival;  Rescission Waived.  Except as otherwise  specifically
set  forth  herein,  all  representations,  warranties  and  covenants,  if any,
contained  herein shall merge with the delivery of the deed  hereunder and shall
not survive the Closing  Date.  Purchaser  agrees that after the Closing Date it
shall  have  no  right  of   rescission   arising  out  of  the  breach  of  any
representation,  warranty  or covenant  of Seller  which,  pursuant to the terms
hereof, survives the Closing.

      14.12.   Counterparts.   This   Agreement   may  be  executed  in  several
counterparts,  and/or by execution of counterpart  signature  pages which may be
attached to one or more  counterpart,  and all so executed shall  constitute one
Agreement binding on all of the parties hereto,  notwithstanding that all of the
parties are not signatory to the original or the same counterpart.  In addition,
any  counterpart  signature page may be executed by any party  wheresoever  such
party is located, and may be delivered by telephone facsimile transmission,  and
any such  facsimile  transmitted  signature  page may be attached to one or more
counterparts of this Agreement,  and such faxed signature(s) shall have the same
force and  effect,  and be as  binding,  as  original  signatures  executed  and
delivered in person.

      14.13.      Authority.

            (a) The  person  executing  this  Agreement  on behalf of  Purchaser
      represents and warrants to Seller and PWIP6 (i) that Purchaser is a Kansas
      corporation validly existing and in good standing, (ii) that Purchaser has
      the  full  right  and  authority  to  enter  into  this  Agreement  and to
      consummate the  transactions  contemplated  hereunder,  and (iii) that the
      person signing this Agreement on behalf of Purchaser is duly authorized to
      do so. At Closing, Seller shall provide evidence satisfactory to Purchaser
      confirming these representations.

            (b)  The  person  executing  this  Agreement  on  behalf  of  Seller
      represents  and warrants to Purchaser (i) that Seller is a Kansas  general
      partnership  validly  existing and in good standing,  (ii) that Seller has
      the  full  right  and  authority  to  enter  into  this  Agreement  and to
      consummate the  transactions  contemplated  hereunder,  and (iii) that the
      person signing this Agreement on behalf of Seller is duly authorized to do
      so. At Closing,  Seller shall provide evidence reasonably  satisfactory to
      Purchaser confirming these representations.

      14.14.  1099  Filing.  In  order  to  comply  with  information  reporting
requirements  of  Section  6045(e)  of the  Internal  Revenue  Code of 1986,  as
amended,  and the Treasury Regulations  thereunder,  the parties agree: (a) that
unless  otherwise  agreed to by the parties in writing,  ATI Title  Company (the
Designee) shall be the party  responsible for reporting the contemplated sale of
the Premises to the Internal Revenue Service on IRS Form 1099-S;  (b) to provide
the Designee with the  information  necessary to complete Form 1099-S;  (c) that
the Designee shall not be liable for the actions taken under this Agreement,  or
for the consequences of those actions, except as they may be the result of gross
negligence or willful  misconduct on the part of the Designee;  and (d) that the
Designee shall be indemnified by the parties for any costs or expenses  incurred
as a result of the actions taken hereunder,  except as they may be the result of
gross  negligence  or  willful  misconduct  on  the  part  of the  Designee.  By
countersigning  this Agreement  below,  the Designee  accepts the designation as
reporting agent and agrees to reporting the contemplated sale of the Premises to
the Internal Revenue Service on IRS Form 1099-S.  The provisions of this Section
shall survive the Closing.

      14.15.  No Third  Party  Beneficiaries.  Except as  specifically  provided
herein, no person or entity that is not a party to this Agreement is intended to
be, nor shall be, a third-party beneficiary hereof.

      14.16.  Time of the  Essence.  Time  is  expressly  declared  to be of the
essence  of this  Agreement,  provided,  however  that  in the  event  any  date
hereunder  falls on a Saturday,  Sunday or legal  holiday,  the date  applicable
shall be the next business day.

      14.17.  Construction  of Agreement.  This Agreement shall not be construed
more  strictly  against one party than against the other merely by virtue of the
fact that it may have been prepared primarily by counsel for one of the parties,
it  being   recognized   that  both   Purchaser  and  Seller  have   contributed
substantially and materially to the preparation of this Agreement.

      14.18. Actions of Seller under Agreement.  Notwithstanding anything to the
contrary in the Partnership  Agreement or otherwise,  wherever this Agreement or
the transactions  hereunder require or permit any notice, consent or approval of
or by Seller,  or  otherwise  require or permit the decision or action of Seller
(including,  without  limitation,  any  decision  to  elect or  pursue  Seller's
remedies under Article 7 hereof), any such notice, consent,  approval,  decision
or action shall be given or taken to or by PWIP6.  PWIP6 is hereby appointed and
constituted  Seller's  attorney-in-fact,  with full  power of  substitution,  to
execute and deliver any notices, documents or other items contemplated hereunder
and  otherwise  take any and all actions  contemplated  or desired  hereunder on
behalf of Seller,  which power of attorney shall be deemed to be coupled with an
interest and irrevocable. Any third party shall be entitled to conclusively rely
on any notice,  document  or other item  executed by PWIP6 as the binding act of
Seller for all  purposes of this  Agreement  and the  transactions  contemplated
hereunder.

                                 [End of Page]


<PAGE>



      IN WITNESS WHEREOF, the parties hereto have executed this Agreement on the
day and year first above written.

                                 SELLER:

                                 REGENTS WALK ASSOCIATES, a Kansas general
                                 partnership

                                 By: PAINEWEBBER INCOME PROPERTIES SIX LIMITED
                                     PARTNERSHIP, a Delaware limited partnership

                                     By: Sixth Income Properties Fund, Inc., a
                                         Delaware corporation, its general
                                         partner


                                         By:  /s/ Peter F. Sullivan
                                              ---------------------
                                         Name:  Peter F. Sullivan
                                         Title:  Vice President


                                 By: PETERSON INTERESTS OF KANSAS, INC., a
                                     Kansas corporation


                                     By:  /s/Kenneth Riedemann
                                          --------------------
                                     Name:  Kenneth Riedemann
                                     Title: President

                                 PURCHASER:

                                 PETERSON INTERESTS OF KANSAS, INC., a Kansas
                                 corporation


                                 By: /s/Kenneth Riedemann
                                     --------------------
                                 Name:  Kenneth Riedemann
                                 Title: President



<PAGE>


                                 PWIP6:

                                 PAINEWEBBER INCOME PROPERTIES SIX LIMITED
                                 PARTNERSHIP, a Delaware limited partnership

                                 By:  Sixth Income Properties Fund, Inc., a
                                      Delaware corporation, its general partner


                                      By:  /s/ Peter F. Sullivan
                                           ---------------------
                                      Name:  Peter F. Sullivan
                                      Title:  Vice President


<PAGE>


                               ESCROW AGREEMENT


      THIS ESCROW  AGREEMENT (this  Agreement)  dated as of May 19, 1999, by and
among REGENTS WALK ASSOCIATES,  a Kansas general  partnership  having an address
c/o  PaineWebber  Properties,  Incorporated,  265 Franklin  Street - 15th Floor,
Boston,  MA  02110  (Seller),  PETERSON  INTERESTS  OF  KANSAS,  INC.,  a Kansas
corporation  having an address at 10000 West 75th Street,  Shawnee  Mission,  KS
66204  (Purchaser),  PAINEWEBBER  INCOME PROPERTIES SIX LIMITED  PARTNERSHIP,  a
Delaware  limited  partnership  having an address  c/o  PaineWebber  Properties,
Incorporated,  265 Franklin Street - 15th Floor,  Boston, MA 02110 (PWIP6),  and
GOODWIN,  PROCTER & HOAR LLP, a partnership including professional  corporations
having an office at Exchange Place, Boston, MA 02109-2881 (Escrow Agent).

                              W I T N E S S E T H:

      WHEREAS,  simultaneously  with the  execution of this  Agreement,  Seller,
Purchaser and PWIP6 have entered into a certain  Purchase and Sale  Agreement of
even date herewith (the Purchase  Agreement)  regarding the sale and purchase of
certain  improved  real  property  (the  Premises)  known  as The  Regents  Walk
Apartments  located in Overland  Park,  as more  particularly  described  in the
Purchase Agreement; and

      WHEREAS,  pursuant to the terms and provisions of the Purchase  Agreement,
Seller,  Purchaser and PWIP6 have agreed that  Purchaser  will deliver to Escrow
Agent,  as  escrowee,  a deposit  (the  Initial  Deposit)  in the amount of Five
Hundred Thousand Dollars ($500,000.00); and

      WHEREAS,  pursuant to the terms and provisions of the Purchase  Agreement,
Seller  may  deliver  to  Escrow  Agent (a) an  additional  deposit  (the  First
Extension  Additional  Deposit)  in the  amount of Two  Hundred  Fifty  Thousand
Dollars  ($250,000.00)  in connection  with an extension of the Closing Date (as
defined in the  Partnership  Agreement) to the First  Extended  Closing Date (as
defined in the Partnership  Agreement) and (b) another  additional  deposit (the
Second Extension Additional Deposit) in the amount of Two Hundred Fifty Thousand
Dollars ($250,000.00) in connection with an extension of the Closing Date to the
Second Extended Closing Date (as defined in the Partnership Agreement); and

      WHEREAS, Seller, Purchaser and PWIP6 have agreed that the Initial Deposit,
the First Additional  Deposit and the Second Additional  Deposit  (collectively,
with all interest accrued thereon, the Deposits) will be held in accordance with
the terms, conditions and provisions contained herein.

      NOW,  THEREFORE,  for good and  valuable  consideration,  the  receipt and
sufficiency of which are hereby acknowledged,  and intending to be legally bound
hereby, the parties agree as follows:

      1.  Simultaneously  with the execution of the Purchase  Agreement and this
Agreement by Purchaser,  Purchaser  shall deliver the Initial  Deposit to Escrow
Agent by wire transfer of  immediately  available  funds  pursuant to the wiring
instructions  annexed  hereto as  Exhibit 1. If  Purchaser  elects to extend the
Closing Date to the First  Extended  Closing Date,  Purchaser  shall deliver the
First  Extension  Additional  Deposit  to  Escrow  Agent  by  wire  transfer  of
immediately  available funds pursuant to the wiring instructions  annexed hereto
as Exhibit 1 (or any other wiring instructions directed by Escrow Agent), and if
Purchaser elects to extend the Closing Date to the Second Extended Closing Date,
Purchaser shall deliver the Second Extension  Additional Deposit to Escrow Agent
by  wire  transfer  of  immediately  available  funds  pursuant  to  the  wiring
instructions  annexed  hereto as  Exhibit 1 (or any  other  wiring  instructions
directed by Escrow Agent).  Following  receipt and collection by Escrow Agent of
any of the  Deposits,  Escrow  Agent shall hold the proceeds of the Deposits and
all interest earned thereon in escrow upon the terms and conditions set forth in
this Agreement.

      2. Escrow Agent shall deliver the Deposits to Seller or Purchaser,  as the
case may be, as follows:

            (a) to Seller,  upon  completion  of the  Closing (as defined in the
      Purchase Agreement), with all interest earned thereon credited against the
      balance of the Purchase  Price (as defined in the Purchase  Agreement) due
      from  Purchaser  to Seller at Closing  (or, at Sellers  election,  if such
      amount is not credited  against the balance of the Purchase Price due from
      Purchaser  to  Seller at  Closing,  the  interest  shall be  delivered  to
      Purchaser  by check or wire  transfer at  Closing),  and, if  requested by
      Escrow Agent, receipt of a letter of direction executed by both Seller and
      Purchaser; or

            (b) to Seller,  after  receipt of  Sellers  written  demand in which
      Seller  certifies  either  that (i)  Purchaser  has  defaulted  under  the
      Purchase Agreement,  and such default, to the knowledge of Seller, has not
      been cured, or (ii) the Purchase  Agreement has been otherwise  terminated
      or canceled,  and Seller is thereby entitled to receive the Deposits;  but
      Escrow Agent shall not honor  Sellers  written  demand until more than ten
      (10) business  days after Escrow Agent has sent a copy of Sellers  written
      demand to  Purchaser in  accordance  with  Paragraphs 3 and 8 hereof,  nor
      thereafter if Escrow Agent receives a Notice of Objection (as  hereinafter
      defined) from Purchaser within such ten (10) business day period; or

            (c) to  Purchaser,  after receipt of  Purchasers  written  demand in
      which Purchaser  certifies  either that (i) Seller has defaulted under the
      Purchase Agreement,  and such default, to the knowledge of Purchaser,  has
      not  been  cured,  or (ii)  the  Purchase  Agreement  has  been  otherwise
      terminated or canceled,  and Purchaser is thereby  entitled to receive the
      Deposits; but Escrow Agent shall not honor Purchasers written demand until
      more than ten (10)  business  days after  Escrow  Agent has sent a copy of
      Purchasers  written demand to Seller in accordance with Paragraphs 3 and 8
      hereof,  nor thereafter if Escrow Agent receives a Notice of Objection (as
      said  term is  hereinafter  defined)  from  Seller  within  such  ten (10)
      business day period.

      Upon delivery of the Deposits in accordance  herewith,  Escrow Agent shall
be relieved of all liability hereunder and with respect to the Deposits.  Escrow
Agent  shall  (unless  otherwise  agreed  to by Escrow  Agent and the  recipient
thereof) deliver the Deposits by wire transfer in accordance with written wiring
instructions actually received by Escrow Agent from the recipient thereof.

      3. Upon receipt of a written demand from Seller or Purchaser  under clause
(b) or (c) of Paragraph 2 hereof, Escrow Agent shall send a copy of such written
demand or notice to the other party.  Within ten (10)  business  days after such
copy has been received or deemed received,  but not thereafter,  the other party
may object to delivery of the Deposits by giving  written notice of objection (a
Notice of  Objection) to Escrow  Agent.  After  receiving a Notice of Objection,
Escrow  Agent  shall send a copy of such  Notice of  Objection  to the party who
filed the written  demand or notice;  and  thereafter,  in its sole and absolute
discretion, Escrow Agent shall elect either:

            (a) to continue to hold the Deposits  until Escrow Agent  receives a
      written  agreement of Purchaser and Seller  directing the  disbursement of
      the Deposits,  in which event Escrow Agent shall  disburse the Deposits in
      accordance with such agreement; and/or

            (b) to deposit the Deposits into any court of competent jurisdiction
      and bring an  action of  interpleader  or any  other  similar  proceeding;
      and/or

            (c) in the event of any litigation between Seller and Purchaser,  to
      deposit the Deposits with the clerk of the court in which such  litigation
      is pending.

      4. If Escrow Agent is uncertain for any reason whatsoever as to its duties
or rights  hereunder  (and  whether or not Escrow Agent has received any written
demand  under   Paragraph  2  or  Notice  of  Objection   under   Paragraph  3),
notwithstanding  anything to the contrary herein, Escrow Agent shall hold and/or
apply the  Deposits  pursuant to  Paragraph 3 hereof and may decline to take any
other action  whatsoever.  In the event the Deposits are deposited in a court of
competent jurisdiction by Escrow Agent pursuant to Paragraph 3(b) or 3(c) above,
Escrow Agent shall be entitled to rely upon a Final Order of such court. As used
herein, a court order shall be deemed a Final Order when (i) the court order has
not been  reversed,  stayed,  modified  or amended  (except  to the extent  that
Purchaser  and Seller  have  consented  to such  modification  or  amendment  in
writing)  and (ii)  the  time for  filing  a  notice  of  appeal,  petition  for
certiorari or motion for  reargument has expired and no such pleading shall then
be  pending.  In the event of any  dispute  whatsoever  among the  parties  with
respect to  disposition  of the  Deposits,  Purchaser  and Seller  shall pay the
attorneys  fees and costs  incurred by Escrow Agent  (which said  parties  shall
share equally, but for which said parties shall be jointly and severally liable)
for any litigation in which Escrow Agent is named as, or becomes, a party.

      5. As used herein, the term Approved  Investment means an interest-bearing
savings  account in Citizens Bank,  State Street Bank and Trust Company,  Boston
Safe Deposit and Trust  Company,  or in any other state or national bank located
in the Boston,  Massachusetts or Providence, Rhode Island reasonably approved by
Purchaser  and Seller (an Approved  Institution).  The rate of interest or yield
need not be the maximum available.

      6.  Notwithstanding  anything to the contrary in the  Purchase  Agreement,
within five (5) business days after receipt and  collection  thereof and receipt
by Escrow Agent of an original  executed W-9 form from  Purchaser,  Escrow Agent
shall place the Deposits in an Approved Investment.  The interest, if any, which
accrues on such Approved  Investment  shall be deemed part of the Deposits;  and
Escrow Agent shall dispose of such interest as and with the Deposits pursuant to
this  Agreement.  Escrow  Agent  may  convert  the  Deposits  from the  Approved
Investment  into cash or a  non-interest-bearing  deposit account at an Approved
Institution as follows:

            (a)  at  any  time  within  five  (5)  business  days  prior  to the
      anticipated Closing Date (as defined in the Purchase Agreement); or

            (b) if such Closing Date is  accelerated  or postponed,  at any time
      within  five (5)  business  days  prior to the  accelerated  or  adjourned
      Closing Date  (provided,  however,  that Seller and  Purchaser  shall give
      Escrow Agent timely notice of any such  acceleration  or  adjournment  and
      that Escrow Agent may hold the Deposits in cash or a  non-interest-bearing
      deposit  account if Seller and  Purchaser  do not give Escrow Agent timely
      notice of any such adjournment).

As long as Escrow  Agent  places  the  Deposits  in an  Approved  Investment  in
accordance  with  the  terms  hereof,  Escrow  Agent  shall  have  no  liability
whatsoever for the rate of interest or yield, if any, earned on the Deposits nor
for the preservation of principal.

      7. Escrow Agent shall have no duties or responsibilities  except those set
forth herein,  which the parties hereto agree are ministerial in nature.  Seller
and  Purchaser  acknowledge  that  Escrow  Agent is serving  without  additional
compensation,  solely as an accommodation to the parties hereto,  and except for
Escrow Agents own willful default or gross  negligence,  Escrow Agent shall have
no liability of any kind  whatsoever  arising out of or in  connection  with its
activity as Escrow Agent.  Seller and Purchaser agree to and do hereby indemnify
and hold harmless Escrow Agent from all loss, cost,  claim,  damage,  liability,
and expense (including,  without  limitation,  attorneys fees and disbursements,
whether  paid to  retained  attorneys  or  representing  the fair value of legal
services  rendered  to itself)  which may be incurred by reason of its acting as
Escrow  Agent.  Escrow  Agent  shall be  entitled  to rely  and/or  act upon any
judgment, certificate, demand or other writing delivered to it hereunder without
being  required to determine the  authenticity  or the  correctness  of any fact
stated  therein,  the propriety or validity  thereof,  or the  jurisdiction of a
court issuing any such judgment provided it acts in good faith. Escrow Agent may
act in reliance upon (i) any instrument or signature  believed to be genuine and
duly authorized and (ii) advice of counsel in reference to any matter or matters
connected herewith.

      8. Any  Notice of  Objection  or  written  demand  or any other  notice or
communication  which  may or must be  sent,  given  or made  under  this  Escrow
Agreement  (each, a Notice) shall be in writing and shall be deemed sent,  given
or made only if delivered by hand, with delivery  evidenced by written  receipt,
or if sent by nationally-recognized  overnight courier,  shipping prepaid (or by
account), addressed to the parties as follows:

      If to Seller or to PWIP6:

            c/o Paine Webber Properties, Incorporated
            265 Franklin Street - 15th Floor
            Boston, MA  02110
            Attn:  Mr. Peter Sullivan

            with a copy to:

            Goodwin, Procter & Hoar  LLP
            Exchange Place
            Boston, MA  02109
            Attn:  Andrew C. Sucoff, Esq.

      If to Purchaser:

            Peterson Interests of Kansas, Inc.
            10000 West 75th Street
            Shawnee Mission, KS  66204
            Attn:  Mr. Kenneth Riedemann

            with a copy to:

            Lewis, Rice & Fingersh
            1010 Walnut, Suite 500
            Kansas City, MO  64106
            Attn:  William E. Carr, Esq.

      If to Escrow Agent:

            Goodwin, Procter & Hoar  LLP
            Exchange Place
            Boston, MA  02109
            Attn:  Andrew C. Sucoff, Esq.

Any  Notice to Escrow  Agent  shall be  deemed  sent,  given or made on the date
received. For purposes of delivering a Notice of Objection to Escrow Agent only,
such Notice of  Objection  may be sent to Escrow  Agent via  facsimile  at (617)
227-8591   followed   by   a   duplicate   notice   sent   the   same   day   by
nationally-recognized   overnight  courier  (with  airbill  evidencing  date  of
shipping),  in  accordance  with this  section.  Any Notice from Escrow Agent to
Purchaser  or Seller shall be deemed  sent,  given or made (i) if by hand,  when
actually received, and (ii) if by  nationally-recognized  overnight courier, the
business day following deposit with such courier.

      9. This Agreement shall be construed and enforced in accordance  with, and
governed  by, the laws of The  Commonwealth  of  Massachusetts.  This  Agreement
embodies the entire agreement and understanding among the parties and supersedes
all prior agreements and  understandings  relating to the subject matter hereof.
This Agreement may not be modified or amended,  or any term or provision  hereof
waived or  discharged,  except in writing  signed by the party against whom such
amendment,  modification,  waiver or discharge is sought to be enforced. All the
terms of this Agreement,  whether so expressed or not, shall be binding upon the
respective  permitted  successors  and assigns of the  parties  hereto and shall
inure to the  benefit  of and be  enforceable  by the  parties  hereto and their
respective permitted  successors and assigns.  This Agreement may be executed in
several  counterparts,  each of which  shall be deemed an  original,  but all of
which together shall constitute one and the same instrument.

      10.  Purchaser  (as to item 10 (a)  below)  and  Seller (as to item 10 (b)
below)  hereby  represent and warrant to each other and to Escrow Agent that the
following represent their true Federal Taxpayer  Identification  Numbers,  which
are being  furnished to Escrow  Agent so that Escrow Agent may file  appropriate
income tax information returns with respect to any interest or other income from
the Approved Investment:

            (a)  Purchasers   Federal   Taxpayer   Identification   Number    is
      48-0998216; and

            (b)  Sellers  Federal Taxpayer  Identification Number is 48-0998810.

      11. Seller and Purchaser waive any claim of conflict of interest by reason
of Escrow Agents representing PWIP6 and/or Seller hereunder,  under the Purchase
Agreement and/or otherwise.  Purchaser hereby  acknowledges that Escrow Agent is
the attorney for PWIP6 and/or Seller, and agrees that Escrow Agent may represent
PWIP6 and/or Seller in connection  with any and all matters,  including  without
limitation,  the  transaction  contemplated by the Purchase  Agreement,  and any
litigation, including any action arising out of this Agreement.

      12.  Reference  is hereby made to that  certain  Partnership  Agreement of
Seller dated as of April 25, 1985 between  Purchaser and PWIP6 (as amended,  the
Partnership  Agreement).  PWIP6 and  Purchaser  are the sole partners of Seller.
Notwithstanding  anything  to the  contrary  in  the  Partnership  Agreement  or
otherwise,  wherever this  Agreement or the  transactions  hereunder  require or
permit any notice,  consent or approval of or by Seller, or otherwise require or
permit the  decision or action of Seller,  any such notice,  consent,  approval,
decision  or  action  shall be given or taken to or by  PWIP6.  PWIP6 is  hereby
appointed  and  constituted  Sellers   attorney-in-fact,   with  full  power  of
substitution,  to execute  and  deliver any  notices,  documents  or other items
contemplated  hereunder and otherwise take any and all actions  contemplated  or
desired  hereunder on behalf of Seller,  which power of attorney shall be deemed
to be coupled with an interest and irrevocable. Escrow Agent and any third party
shall be entitled  to  conclusively  rely on any notice,  document or other item
executed  by  PWIP6  as the  binding  act of  Seller  for all  purposes  of this
Agreement and the transactions  contemplated hereunder.  In addition,  PWIP6 and
Purchaser  acknowledge  and agree that  pursuant to Section 7.1 of the  Purchase
Agreement, in the event that Seller is entitled to receive all or any portion of
the Deposits following a default by Purchaser under the Purchase Agreement,  the
entire  amount of the Deposits  that Seller is entitled to receive shall be paid
directly to, and retained by, PWIP6; and Purchaser (in its capacity as a partner
of Seller) hereby  assigns any and all right,  title or interest in the Deposits
to PWIP6.

      13. Any amendment of the Purchase Agreement which could alter or otherwise
affect  Escrow Agents  obligations  hereunder  will not be effective  against or
binding upon Escrow Agent without  Escrow Agents prior  written  consent,  which
consent may be withheld in Escrow Agents sole and absolute discretion.

                                 [End of Page]



<PAGE>


IN WITNESS  WHEREOF,  the  parties  hereto  have  executed  and  delivered  this
Agreement as of the date first above written.

                                 SELLER:

                                 REGENTS WALK ASSOCIATES, a Kansas general
                                 partnership

                                 By: PAINEWEBBER INCOME PROPERTIES SIX LIMITED
                                     PARTNERSHIP, a Delaware limited partnership

                                     By: Sixth Income Properties Fund, Inc., a
                                         Delaware corporation, its general
                                         partner



                                         By:  /s/ Peter F. Sullivan
                                              ---------------------
                                         Name:  Peter Sullivan
                                         Title:  Vice President



                                 By: PETERSON INTERESTS OF KANSAS, INC., a
                                     Kansas corporation

                                     By:  /s/Kenneth Riedemann
                                          --------------------
                                     Name:  Kenneth Riedemann
                                     Title: President

                                 PURCHASER:

                                 PETERSON INTERESTS OF KANSAS, INC., a Kansas
                                 corporation


                                 By:  /s/Kenneth Riedemann
                                      --------------------
                                 Name:  Kenneth Riedemann
                                 Title: President



<PAGE>


             PAINEWEBBER INCOME PROPERTIES SIX LIMITED PARTNERSHIP
                        265 Franklin Street, 15th Floor
                               Boston, MA  02110



                                September 2, 1999

BY FACSIMILE

Peterson Interests of Kansas, Inc.
1000 West 75th Street
Shawnee Mission, KS  66204

Re:  Purchase  and Sale  Agreement  dated as of May 19,  1999 (as  amended,  the
     Agreement)  by  and  among  Regents  Walk  Associates  (Seller),   Peterson
     Interests of Kansas, Inc. (Purchaser) and PaineWebber Income Properties Six
     Limited Partnership (PWIP6)

Gentlemen:

      Unless  otherwise  defined herein,  capitalized  terms used in this letter
agreement shall have the meanings ascribed to them in the Agreement. The parties
acknowledge  and agree that (i) the Closing Date has been  extended by Purchaser
to September 7, 1999 pursuant to Section 3.1 of the Agreement and (ii) Purchaser
has no further  right to extend the Closing Date.  Purchaser has requested  that
Seller and PWIP6  agree to extend the  Closing  Date from  September  7, 1999 to
September 30, 1999. Purchaser is willing to extend the Closing Date on the terms
and conditions set forth herein.

      In  consideration  of  Seller  agreeing  to  extend  the  Closing  Date as
hereinafter  described,  Purchaser  has  agreed  to (i)  send  $250,000.00  (the
Supplemental  Deposit) to Goodwin,  Procter & Hoar LLP (Escrow Agent) to hold in
accordance with the terms of this letter agreement and (ii) authorize and direct
Escrow Agent to  immediately  disburse  $750,000.00  of the Deposits now held by
Escrow Agent  pursuant to the Escrow  Agreement to PWIP6 in accordance  with the
terms of this letter agreement.  The Supplemental  Deposit shall be delivered to
Escrow Agent by wire transfer or certified check on or before September 3, 1999.

      In addition, Seller and Purchaser hereby agree as follows:

     1.   Supplemental Deposit. The Supplemental Deposit will be held, deposited
          and disbursed by Escrow Agent pursuant to the Escrow  Agreement in the
          same manner as the Deposits.  Without  limiting the  generality of the
          foregoing,  the  Supplemental  Deposit  will be  credited  against the
          balance of the Purchase  Price due at Closing in the manner and to the
          same  extent  as the  Deposits  under  the  Agreement  and the  Escrow
          Agreement.  The wiring information for Escrow Agents escrow account is
          set forth in Exhibit 1 of the Escrow Agreement.  If Purchaser delivers
          the  Supplemental  Deposit,  the balance of the Purchase  Price due at
          Closing  shall  be  Sixteen  Million  Five  Hundred  Thousand  Dollars
          ($16,500,000.00).

     2.   $750,000.00  Disbursement  to PWIP6.  Notwithstanding  anything to the
          contrary contained in the Agreement or the Escrow Agreement, Purchaser
          and  Seller  each  hereby   authorize   and  direct  Escrow  Agent  to
          immediately  deliver the sum of $750,000.00 from the Deposits now held
          by Escrow Agent under the Escrow Agreement to PWIP6.  Such $750,000.00
          disbursement  to PWIP6  shall be  non-refundable;  however,  if Seller
          shall default in its obligation to convey the Premises to Purchaser on
          September 30, 1999,  subject to and in accordance  with the Agreement,
          Purchaser   may  elect  to   obtain  a  refund  of  such   $750,000.00
          disbursement  from PWIP6 in the same  manner,  and to the same extent,
          that  Purchaser may elect to obtain a refund of the Deposits  pursuant
          to Section 8.1 of the Agreement.

     3.   Application  of  Deposits  Following   Purchaser  Default.   Purchaser
          acknowledges and agrees that pursuant to Section 7.1 of the Agreement,
          and  notwithstanding   anything  to  the  contrary  contained  in  the
          Partnership  Agreement,  in the event of a default by Purchaser in the
          performance  of any terms of the Agreement (as amended and affected by
          this letter agreement),  PWIP6 shall be entitled to receive and retain
          all of the Deposits,  the Supplemental Deposit and all interest earned
          thereon,  without adjustment to PWIP6s capital account,  as liquidated
          damages to PWIP6 arising from such default by Purchaser.

     4.   Time of the  Essence.  Time is of the  essence  for (i)  Purchaser  to
          deliver the  Supplemental  Deposit to Seller on or before September 3,
          1999,  and (ii) the Closing to occur on or before  September 30, 1999.
          Purchasers failure to cause any of the foregoing events to occur on or
          before the dates set forth in the preceding sentence shall be deemed a
          material  default by Purchaser under the Agreement  entitling PWIP6 to
          immediately  thereafter  receive the balance of the  Deposits  held by
          Escrow Agent,  the  Supplemental  Deposit,  and all interest,  if any,
          earned thereon.  Purchaser represents and warrants to Seller and PWIP6
          that,  as of the date hereof,  no facts or  circumstances  exist which
          would  entitle  Purchaser to deliver a Notice of Objection (as defined
          in the Escrow  Agreement)  if Seller makes a demand for the  Deposits,
          the Supplemental  Deposit, and all interest, if any, earned thereon in
          accordance  with the terms of the  Escrow  Agreement  and this  letter
          agreement  following  the  failure  by  Purchaser  to cause any of the
          events  described in the first  sentence of this paragraph to occur on
          or before the dates set forth above.

      Except  as  otherwise  provided  herein,  the  Agreement  and  the  Escrow
Agreement  shall  remain  unmodified  and in full force and  effect.  Seller and
Purchaser  hereby ratify and confirm the  Agreement and the Escrow  Agreement as
modified  hereby.  Except as expressly set forth  herein,  the execution of this
letter  agreement shall not be deemed a waiver by any party hereto of any of the
terms,  covenants  and  conditions  contained  in the  Agreement  and the Escrow
Agreement.

      Please  acknowledge  Purchasers  agreement  to the  terms  of this  letter
agreement  by  countersigning  a copy of this  letter  agreement  on  behalf  of
Purchaser  where  indicated  below.  This  letter  agreement  may be executed in
several  counterparts,  and/or by execution of counterpart signature pages which
may be attached to one or more counterpart, and all so executed shall constitute
one letter agreement binding on all of the parties hereto,  notwithstanding that
all of the parties are not signatory to the original or the same counterpart. In
addition,   any  counterpart  signature  page  may  be  executed  by  any  party
wheresoever such party is located,  and may be delivered by telephone  facsimile
transmission, and any such facsimile transmitted signature pages may be attached
to  one  or  more  counterparts  of  this  letter  agreement,   and  such  faxed
signature(s)  shall  have the same  force  and  effect,  and be as  binding,  as
original signatures executed and delivered in person.

                                 Very truly yours,

                                 PAINEWEBBER INCOME PROPERTIES SIX LIMITED
                                 PARTNERSHIP

                                 By: Sixth Income Properties Fund, Inc., its
                                     general partner


                                     By:  /s/ Peter F. Sullivan
                                          ---------------------
                                     Name:  Peter Sullivan
                                     Title:  Vice President

ACKNOWLEDGED AND AGREED TO BY:

SELLER:

REGENTS WALK ASSOCIATES,
a Kansas general partnership

By:   PAINEWEBBER INCOME PROPERTIES
      SIX LIMITED PARTNERSHIP,
      a Delaware limited partnership

      By:   Sixth Income Properties Fund, Inc.,
            a Delaware corporation, its general partner


            By:  /s/ Peter F. Sullivan
                 ---------------------
            Name:  Peter Sullivan
            Title:  Vice President

By:   PETERSON INTERESTS OF KANSAS, INC.,
      a Kansas corporation


      By:  /s/Kenneth Riedemann
           --------------------
      Name:  Kenneth Riedemann
      Title:  President

PURCHASER:

PETERSON INTERESTS OF KANSAS, INC.,
a Kansas corporation


By:  /s/Kenneth Riedemann
     --------------------
Name:  Kenneth Riedemann
Title:  President



<PAGE>


                           DOCUMENT ESCROW AGREEMENT


      THIS DOCUMENT ESCROW AGREEMENT (this Agreement) is made as of September 2,
1999, by and among REGENTS WALK ASSOCIATES,  a Kansas general partnership having
an address c/o Paine Webber Properties, Incorporated, 265 Franklin Street - 15th
Floor,  Boston, MA 02110 (Seller),  PETERSON INTERESTS OF KANSAS, INC., a Kansas
corporation  having an address at 10000 West 75th Street,  Shawnee  Mission,  KS
66204  (Purchaser),  PAINEWEBBER  INCOME PROPERTIES SIX LIMITED  PARTNERSHIP,  a
Delaware  limited  partnership  having an address c/o Paine  Webber  Properties,
Incorporated,  265 Franklin Street - 15th Floor,  Boston, MA 02110 (PWIP6),  and
GOODWIN,  PROCTER & HOAR LLP, a partnership including professional  corporations
having an office at Exchange Place, Boston, MA 02109-2881 (Escrow Agent).

                             W I T N E S S E T H:

      WHEREAS,  Seller,  Purchaser  and PWIP6  (collectively,  the  Parties) are
parties to that certain Purchase and Sale Agreement dated as of May 19, 1999 (as
amended from time to time, the Purchase Agreement); and

      WHEREAS, simultaneously with the execution and delivery of this Agreement,
the  Parties  are  entering  into a  certain  letter  agreement  (the  Extension
Agreement) whereby the Closing Date (as defined in the Purchase Agreement) shall
be extended from  September 7, 1999 to September 30, 1999,  subject to the terms
and conditions set forth in the Extension Agreement; and

      WHEREAS,  PWIP6 has agreed to  execute  and  deliver  to Escrow  Agent the
documents  listed on  Schedule 1 attached  hereto  and made a part  hereof  (the
Escrow  Documents),  which  Escrow  Documents  shall be held and/or  released by
Escrow Agent in accordance with the terms,  conditions and provisions  contained
herein; and

      WHEREAS,  the Escrow  Agent is willing to hold  and/or  release the Escrow
Documents on behalf of the Parties on the terms and conditions set forth herein.

      NOW,  THEREFORE,  in  consideration of ten dollars ($10.00) and other good
and valuable  consideration,  and  intending  to be legally  bound  hereby,  the
Parties and Escrow Agent agree as follows:

      1.  Unless  otherwise  defined  herein,  capitalized  terms  used  without
definition shall have the meanings ascribed to them in the Purchase Agreement.

      2. PWIP6  agrees to execute  and deliver  the Escrow  Documents  to Escrow
Agent on or before September 3, 1999. Upon receipt  thereof,  Escrow Agent shall
hold and/or release the Escrow  Documents in escrow in accordance with the terms
of this Agreement.

      3. Upon  satisfaction of the Escrow  Conditions (as hereinafter  defined),
Escrow Agent shall complete the Escrow  Documents by attaching all schedules and
exhibits and by filling in all blanks  contained  therein as  instructed  by the
Parties and thereafter  deliver the Escrow  Documents out of escrow to ATI Title
Company  (the  Designee),  and the Escrow  Documents  shall be deemed  executed,
delivered  and  effective as specified  in Section 3 hereof.  Alternatively,  at
Escrow  Agents  election,  Escrow  Agent  may at any  time  deposit  the  Escrow
Documents  with the Designee  without  attaching  any  schedules or exhibits and
without completing any blanks contained herein with instructions to the Designee
to (a) hold  the  Escrow  Documents  in  escrow  unless  and  until  the  Escrow
Conditions  have  been  satisfied  and  (b)  upon  satisfaction  of  the  Escrow
Conditions,  complete  the Escrow  Documents  by  attaching  all  schedules  and
exhibits and by filling in all blanks  contained  therein as  instructed  by the
Parties and thereafter release and/or record the Escrow Documents as appropriate
to effect the Closing.

      4. For purposes of this Agreement,  the term Escrow  Conditions shall mean
all of the following:

            (a)  Execution  by  the  Parties  of a  closing  statement  for  the
      transaction (the Closing  Statement) setting forth the Purchase Price, the
      closing adjustments and the application of such amounts;

            (b) Receipt by Escrow  Agent of all  schedules,  exhibits  and other
      information  needed  to  complete  the  Escrow  Documents,  together  with
      instructions from the Parties or counsel to the Parties authorizing Escrow
      Agent to complete the Escrow  Documents with such schedules,  exhibits and
      other information;

            (c) Receipt by Escrow Agent of (i) original executed counterparts of
      the items listed on Schedule 2 attached hereto and made a part hereof (the
      Purchaser  Delivery   Documents)  or  (ii)  a  written   confirmation  and
      undertaking from the Designee that Designee has received original executed
      counterparts of the Purchaser Delivery Documents and is ready, willing and
      able, subject only to receipt by the Designee of the Escrow Documents,  to
      deliver,  release  and/or  record  the  Purchaser  Delivery  Documents  as
      directed by PWIP6; and

            (d) Receipt by Escrow Agent of (i) the PWIP6 Payment (as hereinafter
      defined) for immediate distribution to PWIP6, (ii) confirmation from PWIP6
      that PWIP6 has received the PWIP6 Payment or (iii) a written  confirmation
      and  undertaking  from the Designee  that the Designee has received  PWIP6
      Payment  and is  ready,  willing  and able,  subject  only to  receipt  by
      Designee of the Escrow Documents, to deliver the PWIP6 Payment as directed
      by PWIP6.

      As used  herein,  the term PWIP6  Payment  shall mean such  portion of the
balance of the Purchase Price due to Seller at Closing to be paid or distributed
to  PWIP6  under  the  terms  of the  Purchase  Agreement  and  the  Partnership
Agreement, as shown on the Closing Statement executed by the Parties.

      The Escrow Documents shall not be deemed to have been executed,  delivered
and/or  accepted  unless  and  until  all of the  Escrow  Conditions  have  been
satisfied.

      5. If, for any reason whatsoever,  the Escrow Conditions are not satisfied
before the September 30, 1999 (the Termination Time), the Escrow Documents shall
be void and of no force and effect  whatsoever and shall be deemed never to have
been entered into or executed and  delivered,  and neither  Party shall have any
liability  whatsoever  to the other Party by reason of the execution and deliver
of the Escrow Documents or any matter  whatsoever  pertaining  thereto.  In such
event,  Escrow Agent shall hold the Escrow  Documents for thirty (30) days after
the Termination Time and, promptly thereafter, unless Escrow Agent shall receive
a written  agreement signed by the Parties  directing  otherwise (which no Party
shall have any  obligation  to enter into),  Escrow Agent shall  destroy all the
Escrow Documents to signify that the same have never existed.

      6. Escrow Agent shall have no duties or responsibilities  except those set
forth herein,  which the Parties agree are  ministerial  in nature.  The Parties
acknowledge  that Escrow  Agent is serving  without  compensation,  solely as an
accommodation  to the Parties,  and except for Escrow Agents own willful default
or gross negligence, Escrow Agent shall have no liability of any kind whatsoever
arising out of or in connection  with its activity as Escrow Agent.  The Parties
jointly and severally agree to and do hereby  indemnify and hold harmless Escrow
Agent from all loss, cost, claim,  damage,  liability,  and expense  (including,
without limitation,  attorneys fees and disbursements,  whether paid to retained
attorneys or representing  the fair value of legal services  rendered to itself)
which may be incurred by reason of its acting as Escrow Agent.  Escrow Agent may
rely  and/or  act upon  any  judgment,  certificate,  demand  or  other  writing
delivered to it hereunder  without being required to determine the  authenticity
or the  correctness  of any fact  stated  therein,  the  propriety  or  validity
thereof, or the jurisdiction of a court issuing any such judgment.  Escrow Agent
may rely and/or act upon (i) any instrument or signature  believed to be genuine
and to have been duly  authorized,  executed  and  delivered  and (ii) advice of
counsel in reference to any matter or matters connected herewith.

      7. If Escrow Agent is uncertain for any reason whatsoever as to its duties
or rights  hereunder,  or if Escrow Agent receives  instructions from any person
which (in Escrow  Agents sole  judgment)  conflict  with this Escrow  Agreement,
Escrow Agent may act as follows:

            (a) Escrow  Agent may  continue to hold the Escrow  Documents  until
      Escrow Agent receives a written  agreement of all the Parties with respect
      to  disposition of all the Escrow  Documents,  in which event Escrow Agent
      shall  distribute the Escrow  Documents in accordance with such agreement;
      and/or

            (b) Escrow  Agent may take any and all such  actions as Escrow Agent
      deems  necessary or proper,  in its exclusive  good-faith  discretion,  to
      discharge and terminate its duties under this Escrow Agreement,  including
      (but not limited to) delivery of the Escrow  Documents  into any court and
      the bringing of an action of  interpleader or any other  proceeding  which
      Escrow Agent deems appropriate; and/or

            (c) In  event of  litigation  between  or  among  some or all of the
      Parties  and/or any other  persons,  Escrow  Agent may  deposit the Escrow
      Documents  with the  clerk of the court in which  any such  litigation  is
      pending.

In any such event the Parties agree to pay the attorneys fees and costs incurred
by Escrow Agent,  whether paid to retained  attorneys or  representing  the fair
value of legal  services  rendered  to itself  (which the  Parties  shall  share
equally,  but for which the  Parties  shall be jointly and  severally  liable to
Escrow Agent),  for any litigation which Escrow Agent is named as, or becomes, a
party.

      8. Seller and Purchaser  waive any claim of conflict of interest by reason
of Escrow Agents representing Seller and/or PWIP6 hereunder,  under the Purchase
Agreement and/or otherwise.  Purchaser hereby  acknowledges that Escrow Agent is
the attorney for Seller and/or PWIP6, and agrees that Escrow Agent may represent
Seller  and PWIP6 in  connection  with any and all  matters,  including  without
limitation,  the  transaction  contemplated by the Purchase  Agreement,  and any
litigation, including any action arising out of this Agreement; provided that in
no event shall  Purchaser be responsible  for payment of any fees  incidental to
any such  representation.  The  foregoing  shall not release  Escrow  Agent from
properly performing Escrow Agents duties hereunder.

      9. All notices,  requests,  demands,  elections,  consents,  approvals and
other  communications  hereunder  must be in writing  (each such,  a notice) and
addressed  as follows (or to any other  address  which any Party or Escrow Agent
may designate by a notice):

      If to Seller or to PWIP6:

            c/o Paine Webber Properties, Incorporated
            265 Franklin Street - 15th Floor
            Boston, MA  02110
            Attn:  Mr. Peter Sullivan

            with a copy to:

            Goodwin, Procter & Hoar  LLP
            Exchange Place
            Boston, MA  02109
            Attn:  Andrew C. Sucoff, Esq.

      If to Purchaser:

            Peterson Interests of Kansas, Inc.
            10000 West 75th Street
            Shawnee Mission, KS  66204
            Attn:  Mr. Kenneth Riedemann

            with a copy to:

            Lewis, Rice & Fingersh
            1010 Walnut, Suite 500
            Kansas City, MO  64106
            Attn:  William E. Carr, Esq.

      If to Escrow Agent:

            Goodwin, Procter & Hoar  LLP
            Exchange Place
            Boston, MA  02109
            Attn:  Andrew C. Sucoff, Esq.

Any notice  required  by this  Agreement  to be given or made within a specified
period  of time,  or on or before a date  certain,  shall be deemed to have been
duly given only if (i) delivered by hand,  evidenced by written receipt, or (ii)
mailed by first class,  registered mail, return receipt  requested,  postage and
fees prepaid or (iii) sent by  nationally  recognized  overnight  courier,  fees
prepaid. A notice sent by registered mail (as above) shall be deemed given three
(3) business  days after  mailing.  All other notices shall be deemed given when
received.

      10. This Agreement shall be construed and enforced in accordance with, and
governed by, the laws of The  Commonwealth  of  Massachusetts  without regard to
principles of conflicts of laws.  This Agreement  embodies the entire  agreement
and  understanding  among the parties and  supersedes  all prior  agreements and
understandings  relating to the subject matter hereof. This Agreement may not be
modified or  amended,  or any term or  provision  hereof  waived or  discharged,
except in writing signed by the party against whom such amendment, modification,
waiver or discharge is sought to be enforced.  All the terms of this  Agreement,
whether so expressed  or not,  shall be binding  upon the  respective  permitted
successors  and assigns of the parties  hereto and shall inure to the benefit of
and  be  enforceable  by the  parties  hereto  and  their  respective  permitted
successors and assigns.  This Agreement may be executed in several counterparts,
and/or by execution of counterpart  signature pages which may be attached to one
or more counterpart,  and all so executed shall constitute one Agreement binding
on all of the parties  hereto,  notwithstanding  that all of the parties are not
signatory to the original or same  counterpart.  In  addition,  any  counterpart
signature page may be executed by any party  wheresoever  such party is located,
and may be delivered by telephone facsimile transmission, and any such facsimile
transmitted  signature pages may be attached to one or more counterparts of this
Agreement, and such faxed signature(s) shall have the same force and effect, and
be as binding, as original signatures executed and delivered in person.

      11.  Reference  is hereby made to that  certain  Partnership  Agreement of
Seller dated as of April 25, 1985 between  Purchaser and PWIP6 (as amended,  the
Partnership  Agreement).  PWIP6 and  Purchaser  are the sole partners of Seller.
Notwithstanding  anything  to the  contrary  in  the  Partnership  Agreement  or
otherwise,  wherever this  Agreement or the  transactions  hereunder  require or
permit any notice,  consent or approval of or by Seller, or otherwise require or
permit the  decision or action of Seller,  any such notice,  consent,  approval,
decision  or  action  shall be given or taken to or by  PWIP6.  PWIP6 is  hereby
appointed  and  constituted  Sellers   attorney-in-fact,   with  full  power  of
substitution,  to execute  and  deliver any  notices,  documents  or other items
contemplated  hereunder and otherwise take any and all actions  contemplated  or
desired  hereunder on behalf of Seller,  which power of attorney shall be deemed
to be coupled with an interest and irrevocable. Escrow Agent and any third party
shall be entitled  to  conclusively  rely on any notice,  document or other item
executed  by  PWIP6  as the  binding  act of  Seller  for all  purposes  of this
Agreement and the transactions contemplated hereunder.

      12. Any amendment of the Purchase  Agreement,  this Agreement or any other
instrument  which could alter or  otherwise  affect  Escrow  Agents  obligations
hereunder  will not be effective  against or binding  upon Escrow Agent  without
Escrow  Agents prior  written  consent,  which consent may be withheld in Escrow
Agents sole and absolute discretion.

      IN WITNESS  WHEREOF,  this  Agreement has been duly executed as of the day
and year first above written.

                                 [End of Page]


<PAGE>


IN WITNESS  WHEREOF,  the  parties  hereto  have  executed  and  delivered  this
Agreement as of the date first above written.

                                 SELLER:

                                 REGENTS WALK ASSOCIATES, a Kansas general
                                 partnership

                                 By: PAINEWEBBER INCOME PROPERTIES SIX LIMITED
                                     PARTNERSHIP, a Delaware limited partnership

                                     By: Sixth Income Properties Fund, Inc., a
                                         Delaware corporation, its general
                                         partner


                                         By:  /s/ Peter F. Sullivan
                                              ---------------------
                                         Name:  Peter Sullivan
                                         Title:  Vice President


                                 By: PETERSON INTERESTS OF KANSAS, INC., a
                                     Kansas corporation


                                     By:  /s/Kenneth Riedemann
                                          --------------------
                                     Name:  Kenneth Riedemann
                                     Title: President

                                 PURCHASER:

                                 PETERSON INTERESTS OF KANSAS, INC., a Kansas
                                 corporation


                                 By: /s/Kenneth Riedemann
                                     --------------------
                                 Name: Kenneth Riedemann
                                 Title:  President

                                 PWIP6:

                                 PAINEWEBBER INCOME PROPERTIES SIX LIMITED
                                 PARTNERSHIP, a Delaware limited partnership

                                 By:  Sixth Income Properties Fund, Inc., a
                                      Delaware corporation, its general partner


                                      By:  /s/ Peter F. Sullivan
                                           ---------------------
                                      Name:  Peter Sullivan
                                      Title:  Vice President

                                 ESCROW AGENT:

                                  GOODWIN, PROCTER & HOAR LLP


                                    /s/ Andrew C. Sucoff
                                        ----------------
                                        Andrew C. Sucoff



<PAGE>


                            KANSAS QUIT-CLAIM DEED


      THIS  INDENTURE is made as of September 30, 1999,  by and between  Regents
Walk Associates,  a Kansas general partnership having an address c/o PaineWebber
Properties,  Incorporated,  265 Franklin Street - 15th Floor,  Boston,  MA 02110
(Grantor),  and Peterson Interests of Kansas,  Inc., a Kansas corporation having
an address at 10000 West 75th
Street, Shawnee Mission, KS  66204 (Grantee).

      WITNESSETH,  that  Grantor,  in  consideration  of the sum of Ten  Dollars
($10.00) and other good and valuable  consideration paid by Grantee, the receipt
and sufficiency of which is hereby  acknowledged,  do by these presents  remise,
release and forever quit-claim unto Grantee the following described lots, tracts
or parcels of land, lying,  being and situate in the County of Johnson and State
of Kansas, to-wit:

      Tracts 1 and 2, REGENTS WALK REPLAT, a subdivision in the City of Overland
      Park, Johnson County, Kansas, according to the recorded plat thereof.

      SUBJECT TO all matters affecting the premises, whether or not of record.

      TO HAVE AND TO HOLD THE SAME, with all the rights, immunities,  privileges
and appurtenances  thereto  belonging,  unto Grantee and unto Grantees heirs and
assigns forever.

      IN WITNESS  WHEREOF,  Grantor has  hereunto set its hand as of the day and
year above written.

                                 REGENTS WALK ASSOCIATES, a Kansas general
                                 partnership

                                 By: PAINEWEBBER INCOME PROPERTIES SIX LIMITED
                                     PARTNERSHIP, a Delaware limited partnership

                                     By:  Sixth Income Properties Fund, Inc., a
                                          Delaware corporation, its general
                                          partner


                                          By:  /s/ Peter F. Sullivan
                                               ---------------------
                                          Name:  Peter Sullivan
                                          Title:  Vice President


                                 By: PETERSON INTERESTS OF KANSAS, INC., a
                                     Kansas corporation


                                     By:  /s/Kenneth Riedemann
                                          --------------------
                                     Name:  Kenneth Riedemann
                                     Title: President



<PAGE>


                                 BILL OF SALE


      THIS BILL OF SALE (this Bill of Sale) is dated as of  September  30, 1999,
by REGENTS WALK ASSOCIATES,  a Kansas general  partnership having an address c/o
PaineWebber Properties,  Incorporated, 265 Franklin Street - 15th Floor, Boston,
MA 02110  (Seller),  in favor of PETERSON  INTERESTS  OF KANSAS,  INC., a Kansas
corporation having an address at 10000 West
75th Street, Shawnee Mission, KS  66204 (Purchaser).

      1.    Definitions.

            (a) As used herein,  the term Real Property  shall mean the improved
      real  property  known as The Regents Walk  Apartments  located in Overland
      Park, Kansas, as more particularly  described in that certain Purchase and
      Sale Agreement dated as of May 19, 1999 between Assignor and Assignee.

            (b) As used  herein,  the  term  Personal  Property  shall  mean all
      furniture,  carpeting,  appliances,   equipment,  machinery,  inventories,
      supplies,  signs and other  tangible  personal  property of every kind and
      nature, if any, owned by Seller and installed,  located at and used solely
      in connection  with the  ownership,  occupation  and operation of the Real
      Property.  Personal  Property  specifically  excludes:  (i) any  items  of
      personal  property owned by tenants at or on the Real  Property;  and (ii)
      any  items of  personal  property  owned by third  parties  and  leased to
      Seller.

            (c) As used herein,  the term Intangible  Property shall mean all of
      Sellers right, title and interest, if any, in all intangible assets of any
      nature relating to the Real Property or the Personal Property,  including,
      without  limitation,  all of Sellers right,  title and interest in all (i)
      warranties  and  guaranties  relating  to  the  improvements  or  Personal
      Property  in the  possession  of Seller,  (ii) all  licenses,  permits and
      approvals  relating to the Real Property,  (iii) all logos and trade names
      currently  used by Seller  exclusively  in the  operation  of the Land and
      Improvements,  including the use of the name The Regents Walk  Apartments,
      but excluding the name  PaineWebber  or any derivative  thereof,  (iv) all
      plans and  specifications  and (v) leases for items of  personal  property
      owned by third  parties  and leased to Seller,  in each case to the extent
      that Seller may legally transfer the same.

      2. 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 and the  Intangible  Property to
Purchaser.


      3. As Is. The  Personal  Property  and the  Intangible  Property  is sold,
transferred  and  delivered  by Seller and hereby  accepted by  Purchaser in its
current as is condition,  without any warranties,  covenants or representations,
express or implied, by Seller. Without limiting the generality of the foregoing,
the  Personal  Property and the  Intangible  Property is  transferred,  sold and
delivered without any express or implied warranty of merchantability or fitness.

      4.   Counterparts.   This  Bill  of  Sale  may  be  executed  in  multiple
counterparts,  any or all of which may contain the  signatures of fewer than all
of the parties, but all of which shall constitute a single instrument.

      5. No  Personal  Liability.  Neither  Purchaser  nor anyone  claiming  by,
through or under  Purchaser  shall be entitled to obtain any  judgment  creating
personal liability on the part of the partners of the Seller or of the officers,
directors, shareholders, advisors or agents of Seller or Sellers partners or any
of their  successors.  Under no  circumstances  is any person  other than Seller
liable  for  Sellers  obligations  under  this  Assignment  or in respect of the
transaction  contemplated by this  Assignment,  and Purchaser  hereby waives any
right that it  otherwise  might have to pursue any partner of Seller,  any other
person  who might be liable  for  Sellers  obligations  because of the direct or
indirect ownership interest in Seller, or any officer,  director, agent, advisor
or affiliate of any such partner or other person.


<PAGE>



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

                                 REGENTS WALK ASSOCIATES, a Kansas general
                                 partnership

                                  By:  PAINEWEBBER INCOME PROPERTIES SIX LIMITED
                                       PARTNERSHIP, a Delaware limited
                                       partnership

                                       By: Sixth Income Properties Fund, Inc., a
                                           Delaware corporation, its general
                                           partner


                                           By:  /s/ Peter F. Sullivan
                                                ---------------------
                                           Name:  Peter Sullivan
                                           Title:  Vice President



                                 By: PETERSON INTERESTS OF KANSAS, INC., a
                                     Kansas corporation


                                     By:  /s/Kenneth Riedemann
                                          --------------------
                                     Name:  Kenneth Riedemann
                                     Title: President


<PAGE>


                           ASSIGNMENT AND ASSUMPTION
                        OF LEASES AND SECURITY DEPOSITS


      THIS  ASSIGNMENT  AND  ASSUMPTION  OF LEASES AND SECURITY  DEPOSITS  (this
Assignment) is dated as of September 30, 1999,  between REGENTS WALK ASSOCIATES,
a Kansas  general  partnership  having an address  c/o  PaineWebber  Properties,
Incorporated, 265 Franklin Street - 15th Floor, Boston, MA 02110 (Assignor), and
PETERSON  INTERESTS OF KANSAS,  INC., a Kansas  corporation having an address at
10000 West 75th Street, Shawnee Mission, KS 66204 (Assignee).

      1.    Definitions.

            (a) As used  herein,  the term Leases  means all leases,  tenancies,
      rental  agreements  and occupancy  agreements  affecting the improved real
      property known as The Regents Walk Apartments located in Overland Park, as
      more  particularly  described in that certain  Purchase and Sale Agreement
      dated as of May 19, 1999 between Assignor and Assignee, to the extent that
      Assignor is entitled to transfer the same to Assignee.

            (b) As used herein,  the term Tenant  Deposits  means those security
      deposits held by or for Assignor on account of tenants under the Leases as
      such deposits and with respect to which Assignee  received a credit at the
      closing of the transaction  with respect to which this Assignment has been
      executed  and  delivered.  The Tenant  Deposits  are set forth on attached
      Exhibit A.

      2. Assignment.  For good and valuable  consideration received by Assignor,
the receipt and  sufficiency of which are hereby  acknowledged,  Assignor hereby
grants,  transfers and assigns to Assignee the entire right,  title and interest
of Assignor in and to the Leases and the Tenant Deposits.

      3.  Assumption.  Assignee  hereby  assumes the  covenants,  agreements and
obligations  of Assignor as  landlord  or lessor  under the Leases and  Assignee
further assumes all liability of Assignor for the proper refund or return of the
Tenant Deposits if, when and as required by the Leases.

      4. Indemnity.  Assignee hereby agrees to indemnify and hold Assignor,  its
successors and assigns,  harmless  against all costs,  expenses and  liabilities
(including, without limitation,  attorneys fees and disbursements) of the lessor
under all  Leases  for any  matters  arising  from and  after  the date  hereof.
Assignor  hereby  agrees to indemnify  and hold  Assignee,  its  successors  and
assigns,  harmless  against  all costs,  expenses  and  liabilities  (including,
without  limitation,  attorneys fees and  disbursements) of the lessor under the
Leases for any matters existing prior to the date hereof; provided,  however, it
is expressly understood and agreed that Assignor shall not be responsible to the
lessees under the Leases for Assignees  duty and obligation to return the Tenant
Deposits  to lessees  under the Leases to the  extent  the Tenant  Deposits  are
assigned to Assignee hereunder.

      5. Attorneys  Fees. If either  Assignee or Assignor,  or their  respective
successors or assigns,  file suit to enforce the  obligations of the other party
under this  Assignment,  the  prevailing  party shall be entitled to recover the
reasonable fees and expenses of its attorneys.

      6. Successors and Assigns. This Assignment shall be binding upon and inure
to the benefit of Assignor  and  Assignee and their  respective  successors  and
assigns.

      7. Counterparts. This Assignment may be executed in multiple counterparts,
any or all of which may contain the signatures of fewer than all of the parties,
but all of which shall constitute a single instrument.

      8. As Is. The Leases and the Security  Deposits  are granted,  transferred
and assigned by Assignor  and hereby  accepted by Assignee on an as is, where is
basis, without any warranties, covenants or representations, express or implied,
by Assignor.

      9. No Personal Liability. Neither Assignee nor anyone claiming by, through
or under  Assignee  shall be entitled to obtain any judgment  creating  personal
liability  on the  part of the  partners  of the  Assignor  or of the  officers,
directors, shareholders, advisors or agents of Assignor or Assignors partners or
any of their  successors.  Under  no  circumstances  is any  person  other  than
Assignor liable for Assignors obligations under this Assignment or in respect of
the transaction contemplated by this Assignment,  and Assignee hereby waives any
right that it otherwise might have to pursue any partner of Assignor,  any other
person who might be liable for  Assignors  obligations  because of the direct or
indirect  ownership  interest in  Assignor,  or any  officer,  director,  agent,
advisor or affiliate of any such partner or other person.

                 [Remainder of Page Intentionally Left Blank]



<PAGE>


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

                                  ASSIGNOR:

                                  REGENTS WALK ASSOCIATES, a Kansas general
                                  partnership

                                  By:  PAINEWEBBER INCOME PROPERTIES SIX LIMITED
                                       PARTNERSHIP, a Delaware limited
                                       partnership

                                       By: Sixth Income Properties Fund, Inc., a
                                           Delaware corporation, its general
                                           partner


                                           By:  /s/ Peter F. Sullivan
                                                ---------------------
                                           Name:  Peter Sullivan
                                           Title:  Vice President


                                 By:  PETERSON INTERESTS OF KANSAS, INC., a
                                      Kansas corporation


                                      By:  /s/Kenneth Riedemann
                                           --------------------
                                      Name:  Kenneth Riedemann
                                      Title: President

                                 ASSIGNEE:

                                 PETERSON INTERESTS OF KANSAS, INC., a Kansas
                                 corporation


                                 By: /s/Kenneth Riedemann
                                     -------------------
                                 Name: Kenneth Riedemann
                                 Title:  President


<PAGE>


                    ASSIGNMENT AND ASSUMPTION OF CONTRACTS


      THIS ASSIGNMENT AND ASSUMPTION OF CONTRACTS  (this  Assignment) is entered
into as of September 30, 1999, between REGENTS WALK ASSOCIATES, a Kansas general
partnership  having an address c/o  PaineWebber  Properties,  Incorporated,  265
Franklin  Street  - 15th  Floor,  Boston,  MA  02110  (Assignor),  and  PETERSON
INTERESTS OF KANSAS,  INC., a Kansas corporation having an address at 10000 West
75th Street, Shawnee Mission, KS 66204 (Assignee).

      1. Assignment.  For good and valuable  consideration  received by Assignor
the receipt and  sufficiency of which is hereby  acknowledged,  Assignor  hereby
grants,  transfers and assigns to Assignee the entire right,  title and interest
of  Assignor  in and to  all  service,  supply,  equipment  rental,  management,
operating and leasing  contracts  (collectively,  the  Contracts)  affecting the
improved real property known as The Regents Walk Apartments  located in Overland
Park, as more particularly described in that certain Purchase and Sale Agreement
dated as of May 19, 1999 between  Assignor and Assignee  (the  Purchase and Sale
Agreement),  to the extent that  Assignor  is  entitled to transfer  the same to
Assignee;   provided,  however,  that  the  term  Contracts  shall  exclude  any
agreements  which  PWIP6 (as defined in the  Purchase  and Sale  Agreement)  has
executed on behalf of Assignor without Assignees knowledge.

      2.  Assumption.  Assignee  hereby  assumes the  covenants,  agreements and
obligations of Assignor  under the Contracts  which are applicable to the period
and required to be performed from and after the date of this Assignment, but not
otherwise.  Assignor  shall  remain  liable for the  covenants,  agreements  and
obligations of Assignor  under the Contracts  which are applicable to the period
and required to be performed prior to the date of this Assignment.

      3. Indemnity.  Assignee hereby agrees to indemnify and hold Assignor,  its
successors and assigns, harmless against all loss, costs, expenses, liabilities,
damages,  actions,  causes of  action,  demands  or claims  (including,  without
limitation,  attorneys fees and  disbursements)  arising out of or in connection
with the  obligations  of  Assignor  as  vendee  under the  Contracts  which are
applicable to the period and required to be performed from and after the date of
this  Assignment.  Assignor  hereby agrees to indemnify and hold  Assignee,  its
successors and assigns, harmless against all loss, costs, expenses, liabilities,
damages,  actions,  causes of  action,  demands  or claims  (including,  without
limitation,  attorneys fees and  disbursements)  arising out of or in connection
with the  obligations  of  Assignor  as  vendee  under the  Contracts  which are
applicable to the period and required to be performed  prior to the date of this
Assignment.

      4.  Attorney's  Fees. If either  Assignee or Assignor or their  respective
successors or assigns,  file suit to enforce the  obligations of the other party
under this  Assignment,  the  prevailing  party shall be entitled to recover the
reasonable fees and expenses of its attorneys.

      5. Successors and Assigns. This Assignment shall be binding upon and inure
to the benefit of Assignor  and  Assignee and their  respective  successors  and
assigns.

      6. Counterparts. This Assignment may be executed in multiple counterparts,
any or all of which may contain the signatures of fewer than all of the parties,
but all of which shall constitute a single instrument.

      7. As Is. The Contracts are granted,  transferred and assigned by Assignor
and  hereby  accepted  by  Assignee  on an as is,  where is basis,  without  any
warranties, covenants or representations, express or implied, by Assignor.

      8. No Personal Liability. Neither Assignee nor anyone claiming by, through
or under  Assignee  shall be entitled to obtain any judgment  creating  personal
liability  on the  part of the  partners  of the  Assignor  or of the  officers,
directors, shareholders, advisors or agents of Assignor or Assignors partners or
any of their  successors.  Under  no  circumstances  is any  person  other  than
Assignor liable for Assignors obligations under this Assignment or in respect of
the transaction contemplated by this Assignment,  and Assignee hereby waives any
right that it otherwise might have to pursue any partner of Assignor,  any other
person who might be liable for  Assignors  obligations  because of the direct or
indirect  ownership  interest in  Assignor,  or any  officer,  director,  agent,
advisor or affiliate of any such partner or other person.

                 [Remainder of Page Intentionally Left Blank]


<PAGE>


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

                                 ASSIGNOR:

                                 REGENTS WALK ASSOCIATES, a Kansas general
                                 partnership

                                 By:  PAINEWEBBER INCOME PROPERTIES SIX LIMITED
                                      PARTNERSHIP, a Delaware limited
                                      partnership

                                      By: Sixth Income Properties Fund, Inc., a
                                          Delaware corporation, its general
                                          partner


                                          By:  /s/ Peter F. Sullivan
                                               ---------------------
                                          Name:  Peter Sullivan
                                          Title:  Vice President


                                 By:  PETERSON INTERESTS OF KANSAS, INC., a
                                      Kansas corporation


                                      By:  /s/Kenneth Riedemann
                                           --------------------
                                      Name:  Kenneth Riedemann
                                      Title: President

                                 ASSIGNEE:

                                 PETERSON INTERESTS OF KANSAS, INC., a Kansas
                                 corporation


                                 By: /s/Kenneth Riedemann
                                     --------------------
                                 Name: Kenneth Riedemann
                                 Title:  President





<PAGE>


                          SELLER'S SETTLEMENT STATEMENT

SELLER'S NAME:          Regents Walk Associates

BUYER'S NAME:           Peterson Interests of Kansas, Inc.

SETTLEMENT AGENT:       ATI Land Title Insurance Company
                        1100 Main, Suite 200
                        Kansas City, MO  64105

SETTLEMENT DATE:        September 30, 1999

PROPERTY LOCATION:      The Regents Walk Apartments
                        9130 Riggs
                        Overland Park, Kansas  66212

                                                    Debit            Credit
                                                    -----            ------

Purchase Price                                $17,750,000.00     $

Prorations/Deposits:
   Real estate taxes                                                 92,804.94
   Rent proration                                                     7,854.17
   Prepaid rent                                                       8,390.00
   Free rent                                                          5,915.00
   Security deposits                                                116,960.00

Closing Costs:
   Escrow fee                                                           250.00

Earnest Money Deposit Paid
   to Goodwin, Procter & Hoar                                     1,250,000.00

Interest on Earnest Money                                             9,091.00

Assumption of Lutheran Brotherhood
   Loan ($9,000,000 original principal)                           8,624,441.08
   Accrued interest on loan                                          50,855.56
   Tax escrow assigned to buyer                    43,304.00
                                              --------------     -------------

Subtotals                                      17,793,304.00     10,166,561.75
Funds to seller                                                   7,626,742.25
                                              --------------     -------------

Totals                                        $17,793,304.00     $17,793,304.00
                                              ==============     ==============


1. Proceeds Available for Distribution:
   Funds from closing of the sale of the
   Regents Walk Apartments                      7,626,742.25

   Funds held in escrow
   (including $750,000 disbursed to PWIP)       1,250,000.00

   Interest on funds held in escrow                 9,091.00
                                              --------------

Total                                         $ 8,885,833.25
                                              ==============

2. Distribution of Available  Sales Proceeds:
  Proceeds under proviso of Section
   5.01(1) of the Partnership Agreement:

                                      PWIP 6            PIK            TOTAL
                                      ------            ---            -----

Payment of obligations under
Section 7.01 of the Partnership
Agreement:
   PIK operating loans                             567,609.00       567,609.00
   PWIP 6 operating loans           278,945.00                      278,945.00

Distributions in accordance
with Capital
   Account Balances:
   PIK capital account                             250,000.00       250,000.00
                                                   ----------
   PWIP 6 capital account         7,789,279.25                    7,789,279.25
                                 -------------                   -------------
Total                            $8,068,224.25    $817,609.00    $8,885,833.25
                                 =============    ===========    =============


APPROVED:

PAINEWEBBER INCOME PROPERTIES             PETERSON INTERESTS OF KANSAS, INC.
SIX LIMITED PARTNERSHIP
                                          By:  /s/ Kenneth Riedemann
                                               ---------------------
 By:  Sixth Income Properties                  Kenneth Riedemann
      Fund, Inc.                               President

      By:  /s/ Peter F. Sullivan
           ---------------------
           Peter F. Sullivan
           Vice President



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