Seller should include the Manufactured (Mobile) Home provision in the Additional Provisions Addendum (Standard Form. This written contract delineates the terms and conditions of a sale, encompassing various aspects such as goods, services, pricing, and transaction particulars.A purchase and sale agreement is a contract between a buyer and seller for transacting a property in exchange for a specific price. INTRODUCTION: These guidelines are provided to assist Broker and attorneys who are completing the Offer to Purchase and.