Here are 20 rare state quarters worth additional value, according to Gainesville Coins, USA CoinBook and PCGS.
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These 4 state quarters could be worth serious money

Sorting through your spare change might seem like a mundane task, but collectors know that certain state quarters hiding in your pocket could be worth far more than twenty-five cents. S. Mint in 1999, ...
Add Yahoo as a preferred source to see more of our stories on Google. A manufacturing error on the 1999 Georgia state quarter has increased the coin’s value, and ...
A manufacturing error on the 1999 Georgia state quarter has increased the coin’s value, and some collectors are paying as much as $10,000 for the affected 25-cent ...