Rare US Currency Collecting rare US coins and currency is both for fun and profitable. Special mint editions are popular investments offering spectacular images on silver bullion coins often worth more than their precious metal content. Proof sets issued by the US Mint are highly collectible. It is interesting that proof is not a grade of coin, but rather a type of coin issued by the US Mint in it's original condition, usually sealed in plastic.
Silver Eagle Buillon Coins
Silver Bullion Bars