About five years ago I sold a front aero wheel for my tri bike on eBay. Moments after the auction ended the buyer who posted the winning bid sent an email saying "I hope this wheel is as nice as you say because I have had to send the last four wheels that I've won back..."
My first thought was "oh boy..." Needless to say the guy was a douche and asked for a return because the bearings were "wrecked". I did return his money (after he paid shipping both ways; I turned around and used that wheel in my next half and finished with an overall time of 5:03.
The reason why I posted this is because the aero wheel was my first experience with someone who could never be satisfied... No matter what you do they are unhappy. I suggested that the wheel buyer purchase new because his expectation was like new quality. Here? I would suggest that the buyer buy used.