A Texas residential purchase agreement outlines the terms and conditions of an offer to purchase real estate. Buying or selling company assets?Use this Asset Purchase Agreement to finalize the terms of the transaction. This Land Contract Form is available for use on UpCounsel. Download this free sample Land Contract Form template and have it customized today. A land sales agreement is a legal contract between a seller and a buyer that is used to purchase real estate and outline the terms of the transaction.