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.

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 ...

Check Out: 6 Popular Collectibles That Have Skyrocketed in Value For You: 6 Popular SUVs That Aren't Worth the Cost ... Georgia state quarters from 1999 have several types of errors, according ...