my earlier noting of eBay stupidity, Paul Barford has pointed out that just when you think it can't get any worse, it does. A lot of two fake bits of cuneiform from the same seller (and said to be from the same source) has sold for £431 - even more than the price of the previous rubbish.
The buyer may well be happy with their purchase forever and never accept the truth even if it is pointed out. I used to be on the receiving end of the incredulity (and occasional insults) of such owners when I worked as an auction house 'expert'. The typical reaction was to go into immediate denial, carefully wrap up their fake item again, and then leave shaking their head with a wry smile and a muttered "You don't know what you're talking about". I kept quiet of course but was frequently tempted to yell back "You can't handle the truth!" in my best Jack Nicholson impression.