I don't think anyone buying a name would even think about wading through every page on BB. Most of them have some idea of the sort of name they want based on what they want to use it for.
As an example, if you go to Sedo/Godaddy and search for "happy" you get several pages of happy.extension all at 'make offer', which is completely useless if you are searching for a name for your new business. If you go to BB and search for "happy" you get domains with the word happy, joy, jolly, fun etc all readily priced so you don't have the hassle of negotiation. I don't think BB is perfect, but in terms of searching for the right domain it beats the other markets hands down.