A New York commercial real estate purchase and sale agreement is a contract between a buyer and seller used to transfer ownership of commercial property. This model contract is suitable for any straightforward sale of an existing commercial building or raw land.The property and improvements which the Seller is agreeing to sell and which the Purchaser is agreeing to purchase is known as. Schedule A. Description of premises (to be attached). Use a commercial real estate purchase agreement to secure transactions and protect your interests effectively.