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. Get a comprehensive understanding of Arizona real estate purchase and sale agreements with our indepth overview and free template.Residential Resale Transaction Forms. An Arizona purchase agreement facilitates the sale of real estate for an agreedupon price between the buyer and seller. This particular contract dictates the purchase and sale of real estate in Phoenix and throughout the state. Edit, sign, and share az purchase agreement online. No need to install software, just go to DocHub, and sign up instantly and for free.