The document is a contract for the sale of an artwork between an artist and a purchaser. An art purchase agreement is a contract between an art seller and a buyer that determines the conditions of a sale of a piece of artwork.Current Statewide Term Contracts can be found on this page. Artist agreements outline the terms and conditions of the artistic partnership and allow each party to understand what they are responsible for in the endeavor. Buyer and seller use the form as the official agreement over their intentions to buy and sell.