Although a New York contract includes very little statutorily driven language, other state-specific issues affect many provisions of the contract. Purchaser agrees to use diligent efforts to obtain said approval and shall apply for the mortgage loan within business days after the Seller has accepted this.A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. Agreement to Sell and Purchase; Purchase Price. 2a. Below is a list of the most common documents that are needed in order to sell your Queens' house. We are starting out with the legally required documents. Navigate your real estate purchase with confidence. Discover essential steps, from hiring a lawyer to closing, for a smooth transaction.