The most valuable of those coins — a 1976-S Bicentennial Silver Quarter that came ... But that’s not the only bicentennial quarter that fetches a big price. Plenty of others have as well.

We've all heard of rare coins that sell for thousands, but not many locals recognise the rare coins selling right under their noses.

That law mainly affected U.S. dimes and quarters. Half-dollar coins were still made with 40% silver from 1965 to 1970, but after 1970 no more circulating U.S. coins were made with silver.