10 rarest and most valuable coins in the world (With Pictures)

7. Liberty Head Nickel

The Liberty Head nickel is a 5-cent coin issued in 1913. It was produced without the authorization of the United States Mint, and in a very limited numbers. The existence of the coins became public knowledge only in 1920, all of which were owned by Samuel Brown, a former employee of the Mint. A specimen of the liberty nickel became the first coin to acquire a price of US$100,000 in 1972. In 1996, another specimen became the first to break the million-US$ barrier. Only five specimens of the coin exist now. SEE ALSO: The 10 most expensive Mercedes-Benz in the world (With Pictures)

A specimen was sold for $3.7 million in 2010.