For example, a real estate agentCommercial Real Estate BrokerA commercial real estate broker is a middleman between sellers and buyers of commercial real estate, who helps clients sell, lease, or purchase commercial real estate. A commercial real estate broker has the freedom to work either as an independent agent, or as a member of a commercial real estate brokerage firm. with an established network of colleagues for contacting potential home buyers, in addition to a broad range of market information and advertising outlets. Wholesalers include the middlemen between manufacturers, producers, and retailers. The retailers themselves are the middlemen between wholesalers and the end customers.