Ron Guth: The first of the modern commemorative silver dollars appeared in 1984, when the Mint issued a silver dollar-sized coin to promote the 1984 Summer Olympics in Los Angeles. At least one new commemorative silver dollar has been issued every eyar since then with the exception of 1985. Today, these are among the most popular of all U.S. coins. Numerous topics have been covered over the years, including the White House 200th Anniversary (1992), Olympics (on many occasions), the Leif Ericson Millenium (2000), the Louis Braille Bicentennial (2009), and many others.
The success (or failure) of any particular issue depends on the theme and how broad an appeal it may have. For instance, there is a lot of interest in Olympic issues whereas the 2000-P Leif Ericson commemorative saw limited interest (which translated into a low mintage). Low mintages can translate into higher prices later, once collectors become aware of their scarcity.
Prices for coins in this series are completely dependent on supply and demand, but all are readily available for a price.