An Arizona residential purchase agreement is a legal document outlining the terms and conditions for a buyer's purchase of residential property from a seller. An Arizona purchase agreement facilitates the sale of real estate for an agreedupon price between the buyer and seller.This Real Estate Sale and Purchase Agreement and Escrow Instructions (the. Bill of Sale ; Library File Link. A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. The motor vehicle seller must insert the sales price, nonresident state and Arizona county tax rates and complete all mathematical calculations. I'm gonna break down all the terms and conditions so you can understand what it means and we're gonna fill that out so you can have a real-life example of it.