What is the rarest liberty head silver dollar?

Answer 1

Several designs carried a Liberty Head image. Values depend on many factors so it's difficult to pick a single coin as the most valuable.

Among coins normally called Liberty Head dollars, the top regular issue is probably the 1794 "flowing hair" coin. As of 01/2011 its retail value in top condition is about $975,000.

Morgan dollars are sometimes also referred to as Liberty Head pieces, but they're almost universally known by their designer's name instead. The champ there is an 1889-CC coin which retails for about $937,000 in spectacular MS-68 condition.

But of course the most expensive US silver dollar is the fabled 1804 "original" issue, which sells for around $6 million! These coins are unusual in that collectors now know they're not regular-issue dollars and weren't made in 1804. They were actually minted in 1836 in order to create a set of all denominations for presentation to the King of Siam. However they're not considered counterfeits because they were legally authorized by the government and struck at the Philadelphia Mint.