Double-dipped home sales, where one agent works with both home seller and buyer and retains the entire commission, is one of the most controversial practices in the residential real estate brokerage industry. This report estimates some one million sellers and buyers in home sales with a single agent are charged excessive commissions totaling several billion dollars annually. The report also examines the risks and costs to which home sellers or buyers are exposed because of the conflicts of interest of these double-dipping agents.