Get a comprehensive understanding of Pennsylvania real estate purchase and sale agreements with our indepth overview and free template. View the forms library.A master purchase agreement is a legally binding contract between buyer and seller, and typically relates to buying and selling goods rather than services. Everything you need to know to represent your seller! A For Sale By Owner contract Pennsylvania must include: 1. The Purchase Price, 2. Download Pennsylvania Sales Agreement template, modify and send for signing using BoloForms Signature. Additionally, provide the effective date of the agreement. Step 1 – Fill Out the Buyer and Seller Information. 1. Seller. This form serves as a binding contract once both parties sign it, detailing the sale price, contingencies, and other key terms.