Take a sec to give that state quarter a second look before you drop it in the parking meter or vending machine. There are tons of statehood quarters out there, but some of them are worth way more than ...

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

The Wisconsin state quarter features a cow, cheese, and an ear of corn. One version of this quarter gives the corn an extra leaf low on the ear. This may have happened when a tool was pushed into the ...