Some state quarters in pristine condition could be worth well over $500. Before using your quarters, check whether you have ...

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 pieces.

Some rare U.S. state quarters, especially with errors or low mintage, are now worth hundreds or even thousands of dollars to ...

Errors increase the value of collectibles because a limited number go into circulation before it is spotted and corrected.