How much should I pay for Tuff wheel, button and adapter?

My brother ("blu340dart") buys tuff wheels all the time, I think he's hooked on them, and the first thing he does is to check whether the grip is still tight on the rim or can be twisted with your hands! I'm also pretty sure that $350 is way high as he would never pay anywhere near that, even for the best of examples! Heck, maybe PM him through the board, I'm sure he has one, or 10 to sell!! Geof