It depends on what kind of silver you are asking about.
Silver coins and bullion that are .999 fine silver are worth the most.
Silver US dollars, halves, quarters and dimes minted before 1965 are 90% pure and command a good price also.
Sterling silver, which is 92 1/2% pure is worth a little less. Antique sterling was worth considerably more than the silver content a while back, but for the most part that has changed... Between a completely crashed antiques market and a sky high silver price, you are generally better off selling sterling for the silver content by weight.
Silver plated items have a microscopic amount of actual silver and are pretty much worthless these days.
To get an accurate idea of what your silver would sell for, you can look for the website for the Silver and Gold Exchange. There is a button on their webpage named "Live Price Chart" that shows an up to the minute listing of all kinds of silver items and what they are currently paying. If you Google "Silver and Gold Exchange" you will find them. They also have a very good article on how to tell if your items are sterling silver or silver plated in their "Education" section under "Is It Sterling?".
Going purely by melt value, a U.S. quarter minted before 1965 is currently worth about $5.50 for the silver (as of 11 January 2013).
The value of a bar of silver will depend on both the weight of the bar and the purity of the silver itself. In general, silver is going for $17-19 per ounce. If you try and sell, you will get slightly less than this because whatever company buys the bar will want to make a profit when they resell it to the next customer. One single bar of silver is going to cost about ten to sixteen dollars. It pays about thirteen fifty for an ounce. It is kind of cheap but it is something.
Below is a link to find the value of silver per ounce.
Silvergramsbar.com is an excellent online website to find out the current value of your silver. The price of silver fluctuates so they offer a silver gram calculator for your personal use which will give you the most current value on any given day. They also recommend watching silver auctions on sites such as eBay to give you a better indication of recent values and the going rate.
It is worth its weight in silver. If your coin is what I think it is ("Wade-Ventures" and "World Trade" written on it?), than it has no numismatic value. Its worth is the intrinsic value of the metal. You can find out what that is by going here: http://www.kitco.com/charts/livesilver.html
Going by melt value alone, one is currently worth about $6.
If you are interested only in the silver value, not all Halfcrowns were made from pure silver and the post 1947 coins contained no silver at all. Whatever the going rate for silver is. If you are interested in the collector (numismatic) value of the coins, please provide year and condition of the coins.
It has no value, unfortunately. EPNS stands for Electro-Plated Nickel Silver. It has no silver content and if in rough condition, it's going to have no value as a piece either. Sorry!
Going purely by melt value, a U.S. quarter minted before 1965 is currently worth about $5.50 for the silver (as of 11 January 2013).
The intrinsic value is $14.16 with silver at $18.31 per ounce. With silver at $47/oz, the silver value is $36.36.!!
The value just for the silver is about $3.25
While the price of silver is volatile, lately silver dimes have been going for about $2, quarters for $5 and half-dollars for $10. This is just for silver content though, the numismatic value of some coins are many times greater than their silver bullion content.
Just going by silver content, they're worth about $2 each.
The value is about $3.00 just for the silver
What is the value of an 1864 silver dollar.
The intrinsic value is $14.16 with silver at $18.31 per ounce
The same as they have been for a while as long as the silver price stays steady. If the value of silver goes up so will the value of Morgan dollars. If the value of silver decreases so will the value of your Morgan dollars. An average Morgan dollar can be worth anywhere from 30- 300 dollars depending on condition, date, and mintmark. Some can even be worth more. See the related link below for an online price guide of Morgan silver dollars.