View the forms library. A For Sale By Owner contract Pennsylvania must include: 1.The Purchase Price, 2. A Pennsylvania residential purchase agreement establishes a legal arrangement between a buyer and a seller in a real estate transaction. Pennsylvania requires those selling FSBO to fill out and file many documents and forms. Several of these documents are legally binding agreements. The agreement's contents are generally negotiated between the buyer and seller and endorsed upon acceptance. 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.