It would be easy to think so, but there are still large numbers of people out there that don't surf the net. There are still people who don't have cable and haven't been exposed to Barrett Jackson either.
I think we will see more of these popping up in the years to come as more boomers die off and their families, that don't care for the cars or the troves of parts, are enstranged, or flat out hate what they represent, acquire their stashes and decide to liquidate their inheritances.