A short form purchase and sale agreement for commercial real property located in New York State favoring the seller. An attorney's explanation of an Office Purchase and Sales Agreement and its free template for commercial real estate.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. 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. Use a commercial real estate purchase agreement to secure transactions and protect your interests effectively.