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

Some 1999 Georgia quarters that were mistakenly struck on experimental planchets have sold for extremely high prices, ...

Got spare change lying around? You might want to check for a quarter from 1999 that could be sold for thousands at an auction. Minting errors make the coin extremely valuable because of its rarity and ...

Add Yahoo as a preferred source to see more of our stories on Google. Peter Gudella via Shutterstock Minting coins isn't exactly an exact science. Even though most ...