This attachment should be given to the Buyer prior to the submission of any offer and is not part of the Residential Resale Real Estate Purchase. A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price.Do you want to create an Arizona real estate purchase agreement? Download the real estate purchase agreement template for free here at CocoSign. An Arizona purchase agreement facilitates the sale of real estate for an agreedupon price between the buyer and seller. Step 1 – Fill Out the Buyer and Seller Information. 1. Seller.