Rarest U.S. Coin Is Worth $20 Million

Here's a reason to start collecting, the most valuable rare coins have increased in value by an estimated 25 to 50 percent the past year. There are currently 235 historic U.S. coins valued at $1 million or more that are in private collections or museums (an estimated total combined value of $548.6 million).

1913 Liberty Head nickels,  in 1996 it sold for $1,485,000. It now is valued at $4,500,000," 

A 1794 Silver Dollar (graded PCGS Specimen 66 and shown at left) is listed at $7.85 million up from $5 million last year. In a private collection, this is believed by some experts to be the very first silver dollar struck by the United States Mint.