The property and improvements which the Seller is agreeing to sell and which the Purchaser is agreeing to purchase is known as. Seller shall sell and convey and Purchaser shall purchase the property, together with all buildings and improvements thereon (collectively the.(Form of the Authority Affidavit). THIS PURCHASE AND SALE AGREEMENT (this "Agreement") is made as of this ____ day of. The New York residential purchase and sale agreement allows a prospective homeowner to make a written offer to a seller on a residential property. A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price.