How To Fill Out A Purchase And Sale Agreement Step By Step. A Specimen Agreement of Sale of House Property.THIS AGREEMENT OF SALE executed on the…………….. day of…………….. Two Thousand. The Seller agrees to sell, and the Institution agrees to buy, the Collection for a total purchase price of ______ ("Purchase Price"). The Institution shall. A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price.