There are thousands of types of currency available to collect, including both paper money and coins. For U.S. currency, there are many places for collectors to find new pieces. These include online and at auctions. Here are some of the most common pieces of paper and coin currency that you can find.

Those who attend gun and firearm auctions are typically looking to add to their collection. Some of the items that can be found at these events include curios and relics. Although most do not function, some are still in working order.