The provided context from commercial coin dealer websites does not contain specific information listing the most valuable US silver coins. However, based on general numismatic knowledge, the value of a US silver coin is determined by factors far beyond its silver content, primarily its rarity, historical significance, condition, and collector demand.
Among the most valuable and iconic US silver coins is the 1794 Flowing Hair Silver Dollar. Believed by many experts to be the very first silver dollar struck by the U.S. Mint, its historical importance is immense. A specific specimen, thought to be the first one ever minted, sold at auction for over $10 million, making it one of the most expensive coins in the world.
Another legendary rarity is the 1804 Draped Bust Silver Dollar, often called "The King of American Coins." Despite the date, these coins were not struck in 1804 but were produced in the 1830s and later for diplomatic presentation sets. With only 15 known specimens in existence, they consistently command multi-million dollar prices whenever they appear at auction.
Extreme rarity can also make smaller denomination coins incredibly valuable. The 1894-S Barber Dime is a prime example. Only 24 of these dimes were struck at the San Francisco Mint, and fewer than half are known to survive today. In high grades, this coin is also valued in the millions of dollars. Other notable examples of highly valuable US silver coins include the 1870-S Seated Liberty Dollar and certain key-date Morgan dollars, such as the 1893-S, especially in mint condition.
