Addendum for Reservation of Oil, Gas and Other Minerals. F. Seller desires to sell the Property (as defined in Section 1 below) to Buyer in consideration of Buyer agreeing to amend the Lease as set forth herein.An agreement to sell real estate, or a purchase agreement, is a legally enforceable document that specifies the terms of a real estate transaction. 3.1. The Vendor shall sell and the purchasers shall purchase the business and assets described in the Schedule hereto. A sales and purchase agreement (SPA) is a legal contract that outlines the terms of a transaction and binds an agreement between a buyer and seller. Learn how to fill out a listing agreement properly for Realtors in Texas! Reach out if you need assistance. Fill in the blank form formatted to comply with all recording and content requirements. Often, these requests are reasonable or even necessary to bring the property up to code before the municipality will allow the sale to go through. The owner can choose to sell or mortgage the property without the permission of the beneficiary.