What they could do is have a used equipment section, but add a durability factor so that it would be as if these "used" clubs were actually used. The clubs could be factored to "die" after 50 rounds or several hundred ball strikes. So when someone purchased clubs from WGTBay they would know that they would have to be replaced in the future.
Also, for a fee, before they expired, WGT could "tune" them so that they could last another 50 rounds.
Crap, I just gave them a new revenue stream. I'm bad.