A commercial real estate broker is a licensed professional who helps clients buy, sell, or lease properties that will be used for business purposes. They represent and act as mediators between buyers and sellers. A Top Commercial Real Estate Broker Values Both IQ and EQ. The Competent Broker Fights with Verbal Judo. A Good Broker Knows the Ins and Outs of Commercial Real Estate. Brokers Build a Good Prospect Database. If you are looking to buy, sell or lease any type of commercial real estate chances are you’ve already been told that you should hire a professional commercial broker for the transaction. Much like you wouldn’t file taxes without the help of a CPA or design a house without an Architect, in order to protect your best interests and get the highest return on your investment, you should always engage a Broker for any and all commercial real estate transactions.