Wondering how to clean coins? Have some old coins that are in serious need of a cleaning?... Only low-grade extremely dirty coins will benefit from a good cleaning. Medium- and high-grade coins will actually go down in value if you attempt to clean them, so use your best judgment. Here are the best ways to clean coins, while doing the least damage to the coin itself.
Modern commemorative coins were first issued by the U.S. Mint in 1982. Although these coins are legal tender, they are not minted for general circulation. Each commemorative coin is produced by the U.S. Mint in limited quantity and is only available for a limited time. See how much modern commemorative coins are worth.
Challenge coins are not really coins. They're not made by the U.S. Mint, and they're not used as currency. Challenge coins first appeared during World War I. Here's the story behind challenge coins, why they're called challenge coins, how the coin challenge game works, and how much military challenge coins are worth.
