There's something to be said for collecting old coins. Some people do it for the fun of it or to have a cool story to tell.

Unfortunately, if you’re hoping to finish your quarter collection, you’ll have to keep searching: the Mint no longer produces ...

Here are 20 rare state quarters worth additional value, according to Gainesville Coins, USA CoinBook and PCGS. Keep in mind that “error” coins — the ones primarily included on this list ...