I'm gonna break down all the terms and conditions so you can understand what it means and we're gonna fill that out so you can have a real-life example of it. 1.1 Agreement of Purchase and Sale.This Contract contains the entire agreement of the parties and may not be changed except in writing. Effective February 1, 2024. 1. Exhibit. Exhibit 2.1. With our free Sales Agreement form, you'll be ready to print or download your contract in no time.