There are problems and risks inherent in one-on-one trading. For instance, you must want or need what the other business has to offer, and they have to want what you offer, in equal dollar amounts. WTB sweeps away this traditional constraint. Because transactions are denominated in trade dollars, you can trade with any other participant: making a match between your respective needs becomes unnecessary and irrelevant. Also, when you receive an WTB authorization, you are guaranteed that the funds will go in your account. You don't have that kind of safety when trading on your own.