Here are 20 rare state quarters worth additional value, according to Gainesville Coins, USA CoinBook and PCGS.

Add Yahoo as a preferred source to see more of our stories on Google. PHILADELPHIA — Some rare U.S. state quarters are no longer worth just 25 cents. Collectors say a few special coins from the 50 ...

Add Yahoo as a preferred source to see more of our stories on Google. Each state received a specific quarter design during a program which ran from 1999 to 2008. However, during this time, some of the ...