With our free Sales Agreement form, you'll be ready to print or download your contract in no time. The property and improvements which the Seller is agreeing to sell and which the Purchaser is agreeing to purchase is known as.Exhibit. Exhibit 2.1. You should include an agreement to mediate in the purchase and sale agreement. 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.