I've been spying on Spanish gold for sometime, and the last time is say a pieces of 8 was about six years ago, and it sold for about $400.00, but, don't hold my feet to the fire on this.... There have been others that have sold for as much as $2,500.00. If you can get it appraised before you sell it. I'm sure you'll have a better idea of it's value. Once you have an idea, and if, I were you; I would put it on eBay and see what kind of bidders you'll get, and I'm sure you can sell it for even more.... Good Luck...