A purchase contract in real estate is a legally binding agreement between a buyer and a seller regarding the sale of a property. When it comes to filling out a real estate purchase agreement, several key players are involved: buyers, sellers, real estate agents, and attorneys.(1) The seller must present the buyer with a general warranty deed to the property and show tax statements that prove they are not delinquent on their taxes. A skilled Houston sales and purchase attorney will help you to make prudent decisions. We have decades of experience advising business owners and entrepreneurs. A written real estate purchase agreement is essential when buying a home. It benefits the buyer and the seller and acts as a legally binding agreement. Here you are listing the legal names of the two parties in the contract (the buyer and the seller.