I just found a 1729-1739 Georgius II in the world coins bin. I got it for practically nothing. Is it worth anything? I found it on the web for between $10 and $250 depending on condition. Obviously it's not in great condition, but it's recognizable.
A few years ago I bought a handful of those for a quarter a piece. In higher grades they are scarce, they were heavily circulated coins that had long hard lives - likely circulating into the 19th century - so the circulated coins are not worth more than a buck or so.