It sounds like what you have is a privately minted bullion coin that is meant to look like a US Seated Liberty dollar from the mid 1800's. If it is in fact silver, it is likely worth no more than the metal value of the coin (silver is trading at US$35.30 per troy ounce as of midday on March 4, 2011). If it is not actually silver, it probably has very little value.
5-18-11>> The coin is an American Silver Eagle that's one ounce of pure silver. The value is tied to the spot price of one ounce of silver at the time of sale. As of this date it's $35.03 at 10:09 am.
That is a privately minted silver round. It only has a bullion value for the ounce of silver it contains -- as of 6/2012 that is about $28 Current prices for an ounce of silver can be found at www.kitco.com
It's a silver round not a "coin" value is whatever the spot price of silver is at time of sale.
8-24-11>>> Each coin would have to be given a value according to date, mintmark and grade. Silver is $40.98 (and dropping) per ounce at this time. So a minimum value for each coin is about $30.00.
No, it's not a fake, but it's not a coin, either. It's an ounce of silver bullion minted by a private manufacturer. See the Related Question "What is the value of one troy ounce of .999 fine silver?" for more information.
It's not a coin, it's a bullion piece or "round". Its value is tied to the spot price of silver, currently about $12-$13 per ounce.
The date is on the front of the coin under the "walking Lady" regardless of that, value is about $18.00
....Its a 1 ounce bullion coin/round. These are privately minted rounds produced as an easy way to invest in silver. They are usually not dated because they are not numismatic products and aren't collected as a coin is. Rather they are just worth their intrinsic silver value. Today they are worth about $30, but it depends on silver spot price.
It is not a US coin and therefore has no numismatic value. All value comes from the one troy ounce of silver it contains which at the time of writing is about $33 but keep in mind that silver prices fluctuate wildly.
If it the date is 1942 and says "HALF DOLLAR" on the back then this is not a one-ounce bullion coin; they were first issued in 1986. It's an actual coin that was used in ordinary commerce. Its value is mostly determined by the current price of silver which changes every day. Check a site like kitco or CNNMoney for the current spot price of silver, then multiply by 0.36 for an approximate worth.
Assuming the coin is circulated, still in collectible condition and has no mintmark, the 1922 Peace dollar is the highest mintage, most common date coin of the series, average retail values, as of 5-29-11, are $36.00-$40.00. With silver at $37.96 per ounce the Melt Value of the coin is $29.86.
If the coin is so worn that it has no date, its value is limited to its silver content or about $13.