One coin currently meets both these criteria, with an ultra-rare squiggle imprinted on one side. The collector's item is now so sought after it received 75 bids on an online auction. It was sold ...

One such rare coin, with an ultra-rare squiggle imprinted on one side, was sold on eBay at almost 500 times its face value. The collector’s item has received numerous bids in an online auction ...