You only sign the contract with the seller and hand it over to the investor. To fully complete a wholesale real estate contract, you will most importantly need a seller, wholesaler, buyer, and title company.This episode is ALL about wholesale purchase contracts!! This Goods Purchase Agreement ("Agreement") is entered into this 6th day of. You may need to get a real estate license or some other kind of license in order to assign real estate contracts (wholesale real estate). The process to doing business with San Bernardino County begins with registering with the online procurement system (ePro). You can register at epro.sbcounty. A retail agreement is a legal contract between a manufacturer or wholesaler of a product and the retail business that will sell the product to customers. If you own a small business, Summit cash and carry is a great place for all your wholesale needs. The staff is extremely friendly and helpful.