A purchase agreement is a legal contract between a buyer and a seller. A purchase agreement is a form used for making an offer on a home.It contains a set of conditions and contingencies that are presented to the seller of a home. With our free Sales Agreement form, you'll be ready to print or download your contract in no time. A purchase agreement is most commonly used to create a transaction between a buyer and a seller of residential real estate. Download our printable land purchase agreement template to complete the transaction of land with another party. Use it to make the process much simpler.