I saw this happen to friend at Norwalk....A guy (racer)needed a special lug nut w/ a collar for Weld wheels, well a friend had a set of 10 in the swap area, and sold them to the guy for 10 or 20 dollars,well the next day after the guy used them...he returned with them and said he wanted his money back because he was "a racer in need".

My friend said "Sorry" ...this guy kept saying but "I'm a racer in need" the guy pulled up in a $10,000 john deere utility truck golf cart he then threw them to the ground and walked away... I don't get it... humilty goes a long way.