A Texas Business Purchase Agreement will help transfer business ownership and outline the terms of the sale. Seller owns a shopping center ("Center") known as The Parke, located in the City of San Antonio, County of Bexar, State of Texas.3. What is the filing fee? How many years will it be valid? This article discusses the elements of buying or selling a small business in Texas, whether the business is focused on real estate or otherwise. The following are attached to and are part of this contract for all purposes as if fully set forth: Exhibit A--Description of the Land.