I bought this today from a LCS , i paid 22 dollars for it. I thought i was buying a silver bullion but turns out this is a sterling silver medal. I got worried for a little cause i saw on ebay they had some of these and which are made of bronze and i thought i got ripped off. My coin sais sterling silver on the side so i was relieved but i was wondering how much is this worth ? did i pay too much ?