A Pennsylvania residential purchase agreement establishes a legal arrangement between a buyer and a seller in a real estate transaction. A Pennsylvania purchase agreement creates a secured contract for a residential property transaction.Members must be logged in to view and download standard forms and their guidelines. (Complete 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. PAR's Buyer Agency Contract includes all of the legallyrequired language and allows for a buyer's broker fee to be structured in several ways. Looking for a Pennsylvania real estate purchase agreement template? Download this free version today. 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.