Neatorama reader Miguel Artime sent in this one: a special coin found in the cash register of a Spanish candy shop. It seems that someone decided
to, um, modify the 1 Euro coin featuring the face of King Juan Carlos I de Borbon y Borbon, King of Spain, into the less regal mug of Homer Simpson! The owner does not want to sell it because "it brings good luck."
Link [in Spanish] - Thanks Miguel!