With our free Sales Agreement form, you'll be ready to print or download your contract in no time. A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price.The Seller agrees to sell, and the Institution agrees to buy, the Collection for a total purchase price of ______ ("Purchase Price"). The Institution shall. Looking for local rules and forms? Step 1 – Fill Out the Buyer and Seller Information. 1. Seller. Write down the seller's full name.