I call bullshit. One: for some reason I cannot imagine people like Warren Buffet or even someone with the worth of a Mark Cuban spending any time on a fucking auction site to "get a better deal".
Two: I didn't look at everything but from what I saw, not one bid on anything
They should have called it MillionaireXchange, because people will get the wrong idea with the name. They are really just selling high end luxury stuff, that anyone can buy. Good idea. Small niche, but huge commissions and fees. What they lack in volume they will make in high commissions and fees.