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. When you're ready to buy a home, making an offer is important: oral promises are not legally enforceable in real estate sales.The PAR Agreement of Sale allows you to make an offer to purchase contingent on borrowing money to pay for the house. Let's walk you through how to review and present a real estate purchase contract as a listing agent. A Pennsylvania residential purchase agreement establishes a legal arrangement between a buyer and a seller in a real estate transaction. To write an offer, you fill in the blanks. To write an offer, you fill in the blanks. A For Sale By Owner contract Pennsylvania must include: 1. The Purchase Price, 2. Standard Form Updates ; ASR, Standard Agreement for the Sale of Real Estate, Aug.