BUYER agrees to purchase and SELLER agrees to sell the real property, and the improvements thereon, commonly known as: , in the County of. All terms of the transaction, including sales price and financing, if applicable,.A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. This FSBO paperwork is needed as soon as you accept an offer, so it's useful to have a purchase agreement onhand that you can fill out quickly. In any resulting transaction in which Seller's property is not listed with Broker's firm, Broker will be the exclusive agent of Buyer and not a dual agent also.