We kept one of those Blue fiddys... I got those two from @guyfleegman because he is awesome, but definitely never seen the mistake fiddys in quantity anywhere.
I used to own a 1000 chip set of tourney denoms I sold to a co worker in a stupid moment. Trying to get them back as he never plays but don’t want to bug him too much or he will definitely get the hint they are worth much more than the $900 he paid me.