The 1870 S Seated Liberty Dollar is listed by Cointrackers as the most valuable coin as of 2015, with a worth of $1,959,995. Many Silver Dollars are also extremely valuable, with Cointrackers listing over 20 coins with values of greater than $10,000.
The 1870 S Seated Liberty Dollar has a face value of $1 and consists of $12 worth of silver. 1870 marked the first time in nearly a decade that the Liberty Seated dollars were minted at multiple locations. The 1870 version of the coin was unique in that some coins were minted without a mint mark, some were minted with a Carson City mark, and some had a San Francisco mint mark. The coins bearing San Francisco marks are the most valuable.