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. It requires all purchasers to secure from sellers bulk sale clearance certificates.For further assistance, please call (717) 783-6052. Documents. The seller shall not obtain the signature of the buyer to a contract when it contains blank spaces to be filled in after it has been signed. Calculating Gross Sales. You will fill out the form REV1220 Pennsylvania Exemption Certificate and give it to your vendors. Use a Business Bill of Sale to set out the terms for the sale of a business and transfer the ownership and all assets to the buyer. It's an online PDF, so you can fill it out online and then print it. A For Sale By Owner contract Pennsylvania must include: 1. The Purchase Price, 2.