This auction makes me laugh. They seem to think this is real. http://cgi.ebay.com/ONE-DOUBLOON-1650-COIN-/170596033981?pt=LH_DefaultDomain_0&hash=item27b850e5bd
i have seen one of these before, my eldest grandson found one in a sand pit at a theme park in scotland, when he was 5 they put them in the sand so the kids can find them and claim a prize.