A commercial real estate purchase agreement is a legal document between a buyer seeking to purchase commercial property from a seller for an agreed-upon price. The property and improvements which the Seller is agreeing to sell and which the Purchaser is agreeing to purchase is known as.Personal Property is included in the Purchase Price, has no contributory value, and shall be left for the Buyer. 22. An attorney's explanation of an Office Purchase and Sales Agreement and its free template for commercial real estate. Our firm is here to help you with real estate transactions and matters in Somerset County.