If you are planning to make an offer in Philadelphia, we've compiled a stepbystep guide so you know what to expect. 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.View the forms library. When you receive an Agreement of Sale, your agent will help you make the right decision about negotiating and accepting an offer. The agreement of sale is strictly who's on first what's on second who are the players and that's what we're going to identify here. A Pennsylvania real estate contract is an agreement made when a buyer makes an offer to purchase a property from a seller. There is no offer without a signature. Even for auctions online, as an agent you upload the signed contract when you submit.