Add Yahoo as a preferred source to see more of our stories on Google. Credit: New Africa/Shutterstock Credit: New Africa/Shutterstock You know those pennies, nickels, dimes, and quarters in your ...

Collectors' questions span everything from selling and grading coins to famous U.S. coin designs and Mint policy.

The first rule of coin collecting is: DO NOT CLEAN YOUR COINS. This is the most important piece of advice for any collector, new or old. Serious collectors and experts agree that most coins should ...

Thanks for the hint on cleaning coins. However, please tell the folks not to try it with the new "gold" dollars. I tried to clean up a few, and in less than 15 minutes, the cleaner proceeded to remove ...

Have you got a stash of old coins that have seen better days? Like with anything, you might be wondering whether cleaning them up will get them looking their best. Plenty of coins sell for a small ...