Your typical coin dealer in America isn't going to know what to do with it. If you can find a coin dealer near you that sells foreign coins and "exonumia" like tokens, medals and such like, you might have a better chance.
Skimming through
ebay for "lead seal", Roman ones typically sell for $10 or so, Byzantine and mediaeval period for $50, more modern ones for a few dollars.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis