To fully complete a wholesale real estate contract, you will most importantly need a seller, wholesaler, buyer, and title company. Buy and sell agreements.In a buy and sell agreement, the wholesaler buys a property and holds it for a period of time before reselling it. Learn how to wholesale real estate in Los Angeles: 1. Learn what wholesaling is and how to wholesale real estate in California! Let the experts at Real Estate Skills get you started with our step-by-step guide. Once a potential property is identified, negotiate and secure a wholesale real estate contract. A purchase and sale agreement. Wholesaling real estate is when you find a troubled home and set up a contract with the owner to resell it. You and the seller sign the initial purchase contract, which lays out the purchase price, the address, and the seller's information.