THIS REAL ESTATE PURCHASE AND SALE AGREEMENT (this "Agreement") is dated as of. You can locate Sample Contract Agreements on this page.Documents Sample Construction Agreement (PDF) Sample agreement to be used as a template. 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. This Addendum is intended for use in the City of Oakland. Please also review the separate. A purchase agreement is a binding contract between a buyer and seller that outlines the details of a home sale transaction. This form is made available to real estate professionals through an agreement with or purchase from the California Association of REALTORS®.