Precious metals prices change every day so any answer posted here would be out of date almost immediately. While it's not normal WikiAnswers policy to say "use the internet", that's the best approach in this case. You can check a site such as kitco.com for the latest spot prices.
July 10, 2009 The value of one troy ounce of fine silver is $12.65
As of market closing on August 5, 2009 one troy ounce of silver was valued at $14.60 USD [United States Dollars]
Silver currently sells for about $17/oz
Silver spot price equivalent
Silver currently sells for about $16/oz.
Sorry, my crystal ball is recharging right now.
One ounce of silver is about $32.00 at present. Most people will only want it for its silver value.
Unless you find someone that wants it, value is just for the silver about $27.00
It is worth the price of silver, right now one troy once of silver is worth $27.35 but that changes daily or even hourly.
If it's a 999-fine silver bullion, it would be worth approximately the spot price of silver or around $13.
6-28-11>>> The spot price of silver is $33.58 per ounce.
The value of silver bars depends on the value of silver, at the time of writing silver is $29.09 per troy ounce so your bar would be worth $29.09. However, precious metal prices are volatile and change on a daily or even hourly basis.
It varies with the spot price of precious metals. Right now it is about $21.
The value is based daily on market value of silver being that these coins are 1 Troy ounce .999 fine silver. For a collector that's a different story. The value is based not on what you paid for the coin but what one will pay for the coin. Look on ebay and that will give you a pretty good market price indicator or look at the daily market value of fine silver.