Standard Agreement for the Sale of Real Estate. 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.A Broker is a Dual Agent when a Broker represents both Buyer and Seller in the same transaction. A Licensee is a Dual Agent when a. It's a legally binding contract between a buyer and a seller that establishes the terms and conditions of purchasing real property. The Standard Agreement for the Sale of Real Estate is the primary contract used in Philadelphia real estate. Learn more in our latest guide. Everything you need to know to represent your seller! A sale occurs after the Ending Date of this Contract IF: (1) The sale occurs within ______ days of the Ending Date, AND. Prior to retaining a real estate broker, the property owner enters into a written agreement defining the scope and term of their relationship.