Are your old coins and bills valuable? Expert explains what to look for

(NEXSTAR) - You may have a collection of state quarters you've been working on for years, or a stash of $2 bills you hope have some worth. But when it comes to our currency, are there really any that are worth more than they were meant to be?If you're a currency collector, you know the answer already: yes, there are some dollars and coins that carry a higher value than the U.S. Mint printed on them originally.
Pennies adorned with wheat, for example, could be as worth as much as $1,500 if the da