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4 mistakes to avoid if you find an old coin or bill that could be valuable

According to Donn Pearlman at the Professional Numismatists Guild, there are a few things you should absolutely not do before ...
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Tips to Safely Clean Your Coin Collection

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 ...