Even if you do win a ridiculously low bid, and a seller refuses to sell an item, I don't think you have any recourse except for getting a refund and leaving a negative feedback... and if as a seller, I had a choice of letting a nice bike go for$ 0.99 or getting a negative feedback, I think I just might take the negative.

Unless I was in a good mood and it was a Bikeforums member.