Abstract: This is a system and method of organizing secured purchasing groups (SPGs) to reduce costs and risks for both buyers and sellers by forming binding purchase offers and by selling in volume. The method includes authoring a first buyer to establish an SPG with the buyer's own terms of purchase. Other buyers join the established SPG if they agree to the terms of the SPG. As the established SPG interests more and more buyers and enlists the buyers to become a member, it attracts potential sellers to sell to the buyers of the SPG. A binding purchase contract is established when a seller makes a commitment to sell to a buyer of the SPG. A deposit is required from both the buyer and the seller to deter fraud and to reduce risks. A secret code system helps further reduce fraud and disputes. A user rating system further encourages good community behavior. The results of the rating system are used throughout the system.