The Seller agrees to sell and Buyer agrees to buy the following property, located in the Bexar County, State of Texas,. A Texas residential purchase agreement outlines the terms and conditions of an offer to purchase real estate.A. Tract of land containing approximately 1.1480 acres described as CB BLOCK. Purchase and Sale Agreement. A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. Looking for a Texas real estate purchase agreement template? Download this free version today. If you are obtaining the forms for possible use in a real estate transaction, you should contact a real estate license holder or an attorney for assistance.