This is a "American Silver Eagle" one ounce bullion coin. The value is tied to the spot price of silver at time of sale. As of 11-9-11 it's $34.39 per ounce. This price is a little less than you could buy it for and a little more than you could sell it for. But it gives you an idea of value.
NOTE: The spot price of silver and other precious metals changes by the minute when the market is open. So the value of this coin will go up and down.
It is worth what 1 oz of silver is worth which at the time of writing is $27.59 but silver changes in prices very frequently.
Depending on which company is certifying that grade, it can be worth anywhere from $45 to $125
If you've got an uncirculated coin it is worth silver melt (it has 1 troy ounce of silver), about $32 at the time of writing (although silver spot changes dramatically). If you've got a proof issue (should be in a box with a capsule and should say "proof" on the COA included in the box) you've got a small premium over silver melt, about $50 for a coin in box with the COA included.
Probably around $22-25 USD.
That's just a regular 2006 nickel. That face is President Jefferson. The coin contains absolutely no silver, and is worth exactly 5 cents.
If you are referring to a large coin bearing a picture of Miss Liberty walking, you have a bullion piece sold for its metal content, and worth about $17 at current prices. The denomination of these pieces is artificial because they're sold as precious-metal investments, not for spending. OTOH if you're using the generic term "silver dollar" to refer to one of the small dollar coins carrying a picture of Sacagawea on the front, it's made of copper and manganese, and is worth face value only.
The value is only for the silver in the coin (1oz) cash value will be a little less than the spot price of silver at time of sale, so about $15.00
It's a bullion coin sold for its silver content. As of 07/2008 that's around $17 but varies with the spot price of silver - check the financial section of a newspaper, or CNNMoney.com, for recent quotes.
Your coin is a bullion piece sold for its silver value. It fluctuates with the price of 1 oz of pure silver, around $18 as of 07/2008.
I is worth nothing. A dollar store probably made it for a joke.
No. They all are dated 2006.
It is worth $5.00