The 1980 penny error coins represent some of the most exciting finds for collectors searching through pocket change. With over 12 billion pennies minted that year ...

These coins are more valuable because they are rarer. If they have errors, however, they may be worth a significant sum. Errors can include double stuck coins, which show a ‘shadow’ effect due to ...

As with just about any asset, a coin’s value is determined by its market demand. This means that coins in short supply often see higher demand — and higher values. With coins, supplies are limited ...

You never know when you might come across a valuable error coin, so it helps to know what to look for. Here's a look at five ...