A Pennsylvania residential purchase agreement establishes a legal arrangement between a buyer and a seller in a real estate transaction. A Pennsylvania real estate contract is an agreement made when a buyer makes an offer to purchase a property from a seller.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. You can certainly prepare your own sales agreement, but we recommend having an attorney prepare one on your behalf to ensure your interests are protected. In other words, the seller will have no obligation to make any repairs when a home is sold "as is. In order for us to open title for you, we will require a signed sales contract between the buyers and sellers of the property. Explore helpful forms and information on state realty transfer taxes and local realty transfer taxes (municipal and school).