Mark; These type of double-sided errors would routinely bring in the $300-$400 price range if they were from Atlantic City. Don't dismiss the number of collectors out there who have just about everything else and who can't live without these type chips..... or those chip collectors who specialize in errors who are willing to pay big bucks to obtain them. All one needs is two very competitive bidders bidding each other up... and who really knows how much someone is willing to pay for something they desparately want? As Gene says, if there are many of these error chips around of this issue, the price drops accordingly and very dramatically. Caveat Emptor.