A 2004 American Silver Eagle in Uncirculated condition is worth about $17. Proof is worth about $40.
As of today about $15.00.
That's a US Silver Eagle bullion round, containing one troy ounce of pure silver. If the question is supposed to be about the coin's value, it's currently worth about $28.
Average market value is $44.00 for a certified example.
This is a bullion piece containing 1 oz of silver and is sold for its metal content. It does not circulate; the denomination is an artificial one. As such it's worth about $15 based on the price of silver at the moment.
The value is just for the silver, about $30.00.
It's worth $15.88 for the silver.
About $15.00, retail.
As of today 2-8-11 it's worth about $30.00
Average current market value is $28.00 for this coin.
By the way, this coin should be carrying a "W" mint mark (short for West Point).
That's not really a $1 coin, but rather a 1 ounce silver bullion round. At current silver prices (as of 28 September 2012), it's worth $34.50.
If the coin in question is from the US Mint, it has a Walking Liberty image on the obverse (front) which was reprised from the half dollar used from 1916 to 1947. The reverse has an eagle and includes '1 oz fine silver' note. The intrinsic value would be based on the silver content of one ounce. In general, dealers will sell these for a premium over the value of silver and may buy them at a little below to a little above the silver value. Collector versions of these coins were produced (e.g. proofs with extremely shiny flat surfaces) and should command a premium as well. Some collectors of these proof versions want to have all of the mint items (box, certificate of authentication) which may affect how much they would be willing to pay.