A purchase agreement between wholesaler and the seller. I'm going to be showing you guys how to fill out a trek contract whenever you're wholesaling.Watch this video to learn how to confidently fill out real estate contracts and secure your deal. Learn how to wholesale real estate in Dallas: 1. In this video I'm going to give you a detailed overview on how to wholesale real estate in Texas highlighting the steps. In a buysell agreement, the wholesaler buys a property and holds it for a period of time before reselling it. The wholesaler's ultimate goal is to assign the contract to a thirdparty buyer in exchange for payment. Assign or Close the Deal: Once a deal is secured, wholesalers have the option to assign the contract to another investor for a fee or close the deal themselves. A wholesale agreement is a contract that transfers the ownership of goods from an original seller to the buyer through an intermediary, called the wholesaler. In the state of Texas, you can wholesale properties using the TREC 1-4 Contract.