(photo REUTERS/Eloy Alonso)
How cool is this? You're counting the change in the register at your candy store in small-town Spain, and you come across one of those very rare and highly-coveted "Homer Euros" that were produced in a small, secret batch back in 1998 to test possible looks for the Spanish version of the coin. Some guys have all the luck!
(Special thanks to my friend John, who sent me this story.)