Which includes (taxes) (insurance). The property and improvements which the Seller is agreeing to sell and which the Purchaser is agreeing to purchase is known as.A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. A payment plan agreement outlines an installment plan to repay an outstanding balance over a specified time frame. New York Free Payment Plan Agreement Template. Use our Payment Plan Agreement to set up an installment plan between a lender and a borrower. The Buyer agrees to pay. With this tool, owners and managers can: Download our free blank purchase agreement template in Word or PDF format: sample real estate purchase agreement template.