Document:

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                                                                        Ex. 10.4

                       THIRD AMENDMENT TO CONTRACT OF SALE

      This Third Amendment to Contract of Sale is made and entered into as of
the 27th day of April, 2004, by and between COOK, INC., a Florida corporation
("Seller"), and SILVERLEAF RESORTS, INC., a Texas corporation ("Purchaser").

                               W I T N E S S E T H

      WHEREAS, on or about February 12, 2004, Seller and Purchaser entered into
that certain Contract of Sale pursuant to which Seller agreed to sell and
Purchaser agreed to purchase certain tracts of land containing approximately 5.3
acres, more or less, situated in Davenport, Polk County, Florida, being more
particularly described in the Contract of Sale (the "Property"); and

      WHEREAS, on or about March 18, 2004, Seller and Purchaser entered into a
certain First Amendment to Contract of Sale and on or about March 22, 2004,
Seller and Purchaser entered into a certain Second Amendment to Contract of Sale
(the Contract of Sale as amended is hereinafter referred to as the "Contract");
and

      WHEREAS, pursuant to certain circumstances herein provided, Seller agrees
to grant Purchaser the right to secure the Survey in accordance with Article IV
of the Contract; and

      WHEREAS, in the event Purchaser is granted the right to secure the Survey,
Seller and Purchaser desire to further amend the Contract to extend the Title
Review Period and the Inspection Period as provided for in Articles V and VI of
the Contract, respectively;

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

      1. Seller has not obtained the Survey provided for in Article IV of the
Contract and in the event a Survey satisfactory to Purchaser is not furnished to
Purchaser by April 30, 2004, Purchaser shall assume the responsibility for
securing the Survey in compliance with Article IV of the Contract. In such
event, Purchaser shall bear the cost and expense of securing the Survey;
provided, however, if and only if Purchaser closes the acquisition of the
Property pursuant to the Contract, then Seller shall reimburse Purchaser for
such reasonable cost and expense.

      2. Notwithstanding anything to the contrary contained in the Contract, the
Title Inspection Period (as defined and described in Article V of the Contract)
and the Inspection Period (as defined and described in Article VI of the
Contract) shall expire on the tenth (10th) day following the date on which
Seller furnishes Purchaser with a Survey satisfying the requirements of Article
IV(a) of the Contract; provided, however, that, if Purchaser assumes
responsibility for securing the Survey in accordance with paragraph 1
hereinabove, then the Title Inspection Period and the Inspection Period shall
expire on the tenth (10th) day following the date on which Purchaser obtains a
survey which satisfies the requirements of Article IV(a) of the Contract.
Notwithstanding the foregoing, the Title Inspection Period and Inspection Period
shall in any event expire on or before June 1, 2004. Additionally, if Purchaser
assumes the responsibility of

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securing the Survey, the Purchaser shall instruct the surveyor to simultaneously
deliver a copy of the Survey to the Seller.

      Except as specifically set forth above, all terms and conditions of the
Contract shall remain in full force and effect. All capitalized terms not
otherwise defined herein shall have the meaning given to such terms in the
Contract.

      IN WITNESS WHEREOF, the undersigned have executed this Amendment, as of
the date and year first above written.

                                  SELLER:

                                  COOK, INC., a Florida corporation

                                  By: /S/ DANIEL P. BOSS
                                      -----------------------------------------
                                  Name: Daniel P. Boss
                                  Its:  President

                                  PURCHASER:

                                  SILVERLEAF RESORTS, INC., a Texas corporation

                                  By: /S/ ROBERT E. MEAD
                                      -----------------------------------------
                                  Name: Robert E. Mead
                                  Its:  CEO

                                      -2-<PAGE>

                                                                    EXHIBIT 10.5

                      FOURTH AMENDMENT TO CONTRACT OF SALE

         This Fourth Amendment to Contract of Sale is made and entered into as
of the 15th day of October, 2004, by and between COOK, INC., a Florida
corporation ("Seller"), and SILVERLEAF RESORTS, INC., a Texas corporation
("Purchaser").

                               WITNESSETH

         WHEREAS, on or about February 12, 2004, Seller and Purchaser entered
into that certain Contract of Sale pursuant to which Seller agreed to sell and
Purchaser agreed to purchase certain tracts of land containing approximately 5.3
acres, more or less, situated in Davenport, Polk County, Florida, being more
particularly described in the Contract of Sale (the "Property"); and

         WHEREAS, on or about March 18, 2004, Seller and Purchaser entered into
a certain First Amendment to Contract of Sale; and

         WHEREAS, on or about March 22, 2004, Seller and Purchaser entered into
a certain Second Amendment to Contract of Sale; and

         WHEREAS, on or about April 27, 2004, Seller and Purchaser entered into
a certain Third Amendment to Contract of Sale (the Contract of Sale as amended
is hereinafter referred to as the "Contract"); and

         WHEREAS, Seller and Purchaser desire to further amend the Contract in
order to establish the closing date as provided for in Article IX of the
Contract;

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

         1. Notwithstanding anything to the contrary contained in the Contract,
Seller and Purchaser hereby agree that the closing of the Contract shall occur
on or before Friday, October 22, 2004.

         2. Notwithstanding the execution hereof by Seller and Purchaser, all of
their rights and remedies under the Contract are preserved, including, without
limitation, the Purchaser's right to a second extension is extended to 5:00 P.M.
on Friday October 22, 2004, and the rights and obligations of the parties, if
any, related to the agreements between Interval International and Seller.

         Except as specifically set forth above, all terms and conditions of the
Contract shall remain in full force and effect. All capitalized terms not
otherwise defined herein shall have the meaning given to such terms in the
Contract.

         IN WITNESS WHEREOF, the undersigned have executed this Amendment as of
the date and year first above written.

                                   SELLER:

                                   COOK, INC., a Florida corporation

                                   By:   /S/ DANIEL P. BOSS
                                         ---------------------------------------
                                   Name: Daniel P. Boss
                                   Its:  President

                                   PURCHASER:

                                   SILVERLEAF RESORTS, INC., a Texas corporation

                                   By:   /S/ HARRY J. WHITE, JR.
                                         ---------------------------------------
                                   Name: Harry J. White, Jr.
                                   Its:  CFO<PAGE>

                                                                   EXHIBIT. 10.6

                       FIFTH AMENDMENT TO CONTRACT OF SALE

         This Fifth Amendment to Contract of Sale is made and entered into as of
the 21st day of October, 2004, by and between COOK, INC., a Florida corporation
("Seller"), and SILVERLEAF RESORTS, INC., a Texas corporation ("Purchaser").

                               WITNESSETH

         WHEREAS, on or about February 12, 2004, Seller and Purchaser entered
into that certain Contract of Sale pursuant to which Seller agreed to sell and
Purchaser agreed to purchase certain tracts of land containing approximately 5.3
acres, more or less, situated in Davenport, Polk County, Florida, being more
particularly described in the Contract of Sale (the "Property"); and

         WHEREAS, on or about March 18, 2004, Seller and Purchaser entered into
a certain First Amendment to Contract of Sale; and

         WHEREAS, on or about March 22, 2004, Seller and Purchaser entered into
a certain Second Amendment to Contract of Sale; and

         WHEREAS, on or about April 27, 2004, Seller and Purchaser entered into
a certain Third Amendment to Contract of Sale; and

         WHEREAS, on or about October 15, 2004, Seller and Purchaser entered
into a certain Fourth Amendment to Contract of Sale (the Contract of Sale as
amended is hereinafter referred to as the "Contract"); and

         WHEREAS, Seller and Purchaser desire to further amend the Contract in
order to extend the deadline for closing the Contract and to otherwise modify
the terms and conditions of the Contract as follows;

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

         1. Notwithstanding anything to the contrary contained in the Contract,
Seller and Purchaser hereby agree that the deadline for closing of the Contract,
which is presently October 22, 2004, is hereby extended to November 1, 2004;
provided, however, the effective date of closing, for purposes of: (a) all
prorations, (b) the date of the Note to be executed and delivered by Purchaser
to Seller at closing, and (c) the commencement of interest accrual on the Note,
shall be October 22, 2004.

         2. Notwithstanding the execution hereof by Seller and Purchaser, all
rights and remedies of Seller and Purchaser under the Contract are hereby
preserved including, without limitation, Purchaser's right to obtain a second
extension of the deadline for closing as set forth in Article IX of the
Contract, and the rights and obligations of the parties, if any, with respect to
the agreements between Interval International and Seller.

         Except as specifically set forth above, all terms and conditions of the
Contract shall remain in full force and effect. All capitalized terms not
otherwise defined herein shall have the meaning given to such terms in the
Contract.

         IN WITNESS WHEREOF, the undersigned have executed this Amendment as of
the date and year first above written.

                                   SELLER:

                                   COOK, INC., a Florida corporation

                                   By:   /S/ DANIEL P. BOSS
                                         ---------------------------------------
                                   Name: Daniel P. Boss
                                   Its:  President

                                   PURCHASER:

                                   SILVERLEAF RESORTS, INC., a Texas corporation

                                   By:   /S/ HARRY J. WHITE, JR.
                                         ---------------------------------------
                                   Name: Harry J. White, Jr.
                                   Its:  CFO

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