A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. Are you looking for a loan agreement form in Washington?Download our free Washington Loan Agreement Form which is available as PDF or Word documents. Ensure you know the legal requirements and disclosures of a Washington real estate purchase agreement. Fill in our template to create your agreement. Free Real Estate Purchase Agreement. Answer a few simple questions. The property and improvements which the Seller is agreeing to sell and which the Purchaser is agreeing to purchase is known as.