A YouTube video from Coin AZ looked at eight rare U.S. coins you should not spend. Here's a look at those coins, including ...

Olympic treasure trove unveiled—dive into the history of U.S. Mint Olympic coins as Congress readies approval of legislation ...

Collectors hunting for valuable coins don't have to reach back a century or more to find them -- they can pop back a few ...

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Find out what these 7 coins just sold for, with some selling for close to a million US dollars! See why they're so valuable ...

Read Next: These 11 Rare Coins Sold for Over $1 Million 1964 Kennedy Half Dollar, ‘Accented Hair’ PR69 Attention to detail is important in the numismatics world, and this case is no different.

A 1974 Eisenhower silver dollar in Wolfforth, Texas, on May 18, 2012. Eisenhower coins with no mint marks can be worth as much as $13,500 on the coin collectors market.

Under California law, stores and other businesses aren’t required to take cash payments. However, there have been efforts in the Golden State to protect people who want to pay with bills and coins.

However, 1921-S coins in pristine uncirculated condition are extremely rare and have been known to sell in the open market for as much as $250,000. If you have one of those, don't lose it.

Read Next: These 11 Rare Coins Sold for Over $1 Million 1964 Kennedy Half Dollar, ‘Accented Hair’ PR69 Attention to detail is important in the numismatics world, and this case is no different.