The property and improvements which the Seller is agreeing to sell and which the Purchaser is agreeing to purchase is known as. In this video, Ron Rhode will be going over the A.CRE Office Purchase and Sales Agreement free real estate template.When purchasing commercial real estate, you should include a due diligence period as a crucial element in your negotiations and in the contract. An attorney's explanation of an Office Purchase and Sales Agreement and its free template for commercial real estate. This Standard Document is a long form purchase and sale agreement for commercial property favoring the purchaser.