Document:

<PAGE>

                                                                   EXHIBIT 10.23

                               FIFTH AMENDMENT TO
                         AGREEMENT OF PURCHASE AND SALE

        This Fifth Amendment to Agreement of Purchase and Sale (this
"AMENDMENT") is made as of the 13th day of July, 2004, by and between ARISTOCRAT
FUND IV, L.P., a Texas limited partnership ("SELLER") and AUDELIA PLAZA, LTD., a
Texas limited partnership ("PURCHASER").

                                    RECITALS

        The following provisions form the basis for this Amendment and are
incorporated herein for all purposes:

        A.      Seller and Purchaser have previously entered into a certain
Purchase and Sale Agreement dated as of February 27, 2004 with respect to the
sale of a shopping center commonly known as Plaza Bank Shopping Center situated
in Dallas, Texas, as more particularly described in the Purchase Agreement (the
"PROPERTY"), which Purchase Agreement was amended by that certain (i) First
Amendment to Agreement of Purchase and Sale dated as of March 25, 2004, (ii)
Second Amendment to Agreement of Purchase and Sale dated as of May 5, 2004 (the
"SECOND AMENDMENT"), (iii) Third Amendment to Agreement of Purchase and Sale
dated as of June __, 2004 (the "THIRD AMENDMENT") and (iv) Fourth Amendment to
Agreement of Purchase and Sale dated as of June 28, 2004 (the "FOURTH
AMENDMENT") (as amended, the "PURCHASE AGREEMENT"). The Purchase Agreement is
incorporated herein and made a part hereof for all purposes.

        B.      Purchaser and Seller desire to amend the Purchase Agreement as
hereinafter set forth.

        NOW, THEREFORE, for and in consideration of the mutual covenants herein
contained and other good and valuable consideration, the receipt and sufficiency
of which is hereby acknowledged, Purchaser and Seller do hereby agree as
follows:

        1.      DEFINED TERMS. All capitalized terms used but not defined in
this Amendment shall have the meaning ascribed to such capitalized terms in the
Purchase Agreement.

        2.      LOAN ASSUMPTION APPROVAL. On April 12, 2004, Purchaser exercised
its right to extend the time to obtain Loan Approval pursuant to SECTION 5.7(C)
of the Purchase Agreement by delivering written notice of such extension to
Seller. Pursuant to such notice, the date to obtain Loan Approval was extended
to May 12, 2004, and such date was subsequently extended to July 14, 2004
pursuant to the Fourth Amendment. Purchaser has been working diligently to
obtain Loan Approval, but has not yet received the Loan Approval from Lender.
Accordingly, Seller and Purchaser hereby agree that Purchaser shall have until
5:00 p.m. on July 21, 2004 to obtain Loan Approval from Lender. In the event
that Purchaser is not able to obtain Loan Approval on or before such date,
Seller or Purchaser may terminate the Purchase Agreement in which event the
Earnest Money shall be returned to Purchaser and the parties shall have no
further rights or obligations under the Purchase Agreement except for those
which expressly survive termination.

<PAGE>

        3.      CLOSING DATE. The parties agree that the Closing Date under the
Purchase Agreement shall be July 28, 2004, unless otherwise agreed by the
parties in writing.

        4.      INTEGRATION; CONFLICTS. The parties hereto hereby affirm and
ratify each and every provision of the Purchase Agreement (as modified hereby),
and confirm that the same remains in full force and effect as of the date
hereof. In the event of a conflict between the terms of the Purchase Agreement
and the terms hereof, the rights and obligations of the parties hereto shall be
governed by the terms of this Amendment.

        5.      COUNTERPARTS. This Amendment 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. The parties further agree
that an executed facsimile counterpart hereof shall constitute a binding
agreement and be treated as an original document.

        6.      SUCCESSORS AND ASSIGNS. The provisions of this Amendment shall
inure to the benefit of and shall be binding upon the parties hereto and their
respective heirs, successors and assigns and the legal representatives of their
estates, as the case may apply.

        7.      SEVERABILITY. If any term, covenant or condition of this
Amendment or its application to any person or circumstances shall be invalid or
unenforceable, the remainder of this Amendment, or the application of such term
or provision to persons or circumstances other than those to which it is held
invalid or unenforceable shall not be affected, and each term shall be valid and
enforceable to the fullest extent permitted by law.

        8.      GOVERNING LAW. This Amendment shall be governed and construed in
accordance with the internal laws of the State of Texas.

                [Remainder of this page intentionally left blank]

<PAGE>

        EXECUTED as of the date set forth above.

                                SELLER:

                                ARISTOCRAT FUND IV, L.P., a Texas limited
                                partnership

                                By: Today Plaza Center GP, Inc., its General
                                    Partner

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

                                PURCHASER:

                                AUDELIA PLAZA, LTD., a Texas limited partnership

                                By: GP Audelia Plaza, Inc., its general partner

                                    By:
                                       -----------------------------------------
                                        William L. Hutchinson, President<PAGE>

                                                                   EXHIBIT 10.24

                    ASSIGNMENT OF PURCHASE AND SALE AGREEMENT

        This Assignment of Purchase and Sale Agreement (this "ASSIGNMENT") is
made as of July ___, 2004, by AUDELIA PLAZA, LTD., a Texas limited partnership
("ASSIGNOR"), and Behringer Harvard plaza skillman LP, a Texas limited
partnership ( "ASSIGNEE").

                                   BACKGROUND

        A. Assignor, as Purchaser, entered into that certain Purchase and Sale
Agreement dated effective as of February 27, 2004 (as same may have been
amended, the "AGREEMENT"), with Aristocrat Fund IV, L.P., a Texas limited
partnership, as Seller, in respect of a shopping center commonly known as Plaza
Bank Shopping Center in Dallas County, Texas, as more particularly described in
the Agreement (the "PROPERTY").

        B. Assignor desires to assign all of its interest in the Agreement to
Assignee and Assignee desires to accept the assignment.

                                    AGREEMENT

        1. ASSIGNMENT. For good and valuable consideration paid to Assignor, the
receipt and sufficiency of which are hereby acknowledged, Assignor does hereby
ASSIGN AND TRANSFER to Assignee all of the right, title and interest of Assignor
in and to the Agreement. Assignor hereby accepts such assignment and assumes and
agrees to perform all obligations of Assignor as "Purchaser" under the
Agreement.

        2. DEPOSIT. Assignor has deposited the amount of $50,000 as Earnest
Money under the Agreement, and an additional deposit of Earnest Money in the
amount of $100,000 is now due under the Agreement. Concurrently with the
execution of this Agreement, Assignee shall cause Behringer Harvard Short-Term
Opportunity Fund I LP, a Texas limited partnership ("BH SHORT TERM") to deposit
with the Title Company (as defined in the Agreement) the amount of $200,000. Of
this amount, the sum of $100,000 shall be deposited as Earnest Money under the
Agreement. The remaining $100,000 (the "SEPARATE DEPOSIT") shall be held in a
separate escrow account by the Title Company pursuant to the following terms and
conditions: (a) if the transaction that is the subject of the Agreement fails to
close because of a default caused by BH Short Term, then the Title Company shall
deliver the Separate Deposit to Assignor (and receipt of such sum shall be the
sole and exclusive remedy of Assignor for such default); and (b) if the
transaction that is the subject of the Agreement closes, or fails to close for
any reason other than a default caused by BH Short Term, then the Title Company
shall deliver the Separate Deposit to BH Short Term.

        3. APPLICATION OF EARNEST MONEY. Assignor and BH Short Term, among
others, have executed (or will execute) that certain Agreement of Limited
Partnership of Assignee (the "PARTNERSHIP AGREEMENT"), pursuant to which
Assignor is to contribute 14.29% of the amount necessary to acquire the Property
and BH Short Term is to contribute 85.61% of the amount necessary to acquire the
Property. Upon the closing of the transaction that is the subject of the
Agreement, the portion of the Earnest Money deposited by Assignor ($50,000)
shall be credited towards the contribution required to be made by Assignor under
the Partnership Agreement, and the portion of the Earnest Money deposited by BH
Short Term ($100,000) shall be credited towards the contribution required to be
made by BH Short Term under the Partnership Agreement.

<PAGE>

        4. REPRESENTATIONS. Assignor hereby unconditionally represents and
warrants to, and covenants with, Assignee as follows:

                (a) The Agreement is in full force and effect. A true, correct
        and complete copy of the Agreement and all amendments is attached hereto
        as EXHIBIT A.

                (b) Purchaser is not currently in default under the Agreement,
        and, to Purchaser's knowledge, no default by Seller exists under the
        Agreement.

                (c) After the execution of this Assignment, Assignee shall have
        the sole right to exercise any right to terminate the Agreement.

                (d) Neither Assignor nor any affiliate of Assignor is receiving
        any compensation in connection with the acquisition of the Property,
        other than such compensation as is reflected in documents executed by
        Assignee or affiliates of Assignee. Without limiting the generality of
        the foregoing, Assignor represents and warrants to Assignee that
        Assignor has not and will not receive any commission or other payment
        from Seller in connection with the sale of the Property, except as
        provided in the Agreement.

        5. FURTHER ASSURANCES. Each party agrees that it will without further
consideration execute and deliver such other documents and take such other
action, whether prior or subsequent to Closing, as may be reasonably requested
by the other party to consummate more effectively the purposes or subject matter
of this Agreement.

        6. ATTORNEYS' FEES. In the event of any controversy, claim or dispute
between the parties affecting or relating to the subject matter or performance
of this Agreement, the prevailing party shall be entitled to recover from the
non-prevailing party all of its reasonable expenses, including reasonable
attorneys' fees.

        7. COUNTERPARTS. This Agreement may be executed in several counterparts,
and all such executed counterparts shall constitute the same agreement. It shall
be necessary to account for only one such counterpart in proving this Agreement.

        8. SEVERABILITY. If any provision of this Agreement is determined by a
court of competent jurisdiction to be invalid or unenforceable, the remainder of
this Agreement shall nonetheless remain in full force and effect.

        9. APPLICABLE LAW. THIS AGREEMENT IS PERFORMABLE IN DALLAS COUNTY,
TEXAS, AND SHALL IN ALL RESPECTS BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE
WITH, THE SUBSTANTIVE FEDERAL LAWS OF THE UNITED STATES AND THE LAWS OF THE
STATE OF TEXAS.

        10. CAPTIONS. The section headings appearing in this Agreement are for
convenience of reference only and are not intended, to any extent and for any
purpose, to limit or define the text of any section or any subsection hereof.

        11. CONSTRUCTION. The parties acknowledge that the parties and their
counsel have reviewed and revised this Agreement and that the normal rule of
construction to the effect that any ambiguities are to be resolved against the
drafting party shall not be employed in the interpretation of this Agreement or
any exhibits or amendments hereto.

<PAGE>

        EXECUTED to be effective as of the date first written above.

                      [This space intentionally left blank]

<PAGE>

                                            ASSIGNOR:

                                            AUDELIA PLAZA, LTD.,
                                            a Texas limited partnership

                                            By:  GP Audelia Plaza, Inc.,
                                            a Texas limited partnership

                                                     By:_______________________
                                                     Name:_____________________
                                                     Title:____________________

<PAGE>

                                ASSIGNEE:

                                BEHRINGER HARVARD PLAZA SKILLMAN LP,
                                a Texas limited partnership

                                By:  Behringer Harvard Plaza Skillman GP, LLC,
                                     a Texas limited liability company,
                                     Its general partner

                                     By:______________________________________
                                     Name:____________________________________
                                     Title:___________________________________

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00072-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00072-of-00352.parquet"}]]