A rare error coin could be worth over $100,000 and it might be hiding in your pocket without you realising. So here's how to find this little gem in your wallets ...

The '80s produced a quartet of coins that are rare, coveted and potentially valuable. Keep an eye out in your couch cushions ...

Add Yahoo as a preferred source to see more of our stories on Google. tab1962 / iStock via Getty Images Most of the time, a penny is worth just one cent, but in the case of the most valuable pennies, ...

The most expensive coin collection ever assembled numbers 15,000 coins—it’s so large and historically thorough that it’s being sold in a series of 15 auctions set to spread out over three years.

Production errors and unique background stories make some historic coins now worth way more than their face values. And holding on to them, including those in the list below, could mean increased ...