The Agreement of Sale for Commercial Real Estate should be used to outline the terms of the agreement when selling or purchasing a commercial property. View the forms library.A business purchase agreement should detail the names of the buyer and seller at the start of the contract. Legal advise and agreements for purchasing a business or selling a business. Get our free, updated 2022 checklist for business buyers. How to fill out the Standard Real Estate Sale Agreement Pennsylvania? 1. Enter buyer and seller details. 2.