Our experience with selling a business bares this out. There is a lot of work needed to complete this type of transaction. Buyers almost always say they have the money only to find later that they had a bit of a "Pinocchio Nose." This situation causes huge losses of time for the owner. A good Business Broker can shorten, if not eliminate potential buyers who are not really qualified to buy your business.
As an owner the most important thing you can do is pay attention to your business while your Business Broker is working for you in the background.