First thing is, if the quarters are all dated 1964 or before they are 90% silver. The average buying price of 90% silver coins is 17 times face value as of 2-14-11. So 500 X 17 = $8,500.00. Some buyers pay more, and some less, it depends on the spot price of silver at the time of sale.
The simple answer is that ANY US silver coin dated 1964 or earlier, and any US half dollar dated 1970 or earlier, will automatically be worth much more than face value. By 2011 the price of silver has gone up 25 to 30 times what it was back in 1964, so at that price the raw metal value of any silver half is $12 to $15 depending on the current spot price. Of course any dealer or "we buy old coins" place will pay wholesale, but you can get about 20 times face value. HOWEVER ... many older halves (1940 and before) can be worth more to a collector depending on their condition and mint mark. It's a really bad idea to take them to a metal buyer without first finding out what their collector value is.
It's a common coin, still in circulation, has no silver and is just face value.
No, dimes dated 1965 and later are not silver and unless in mint packaging are only worth 10 cents.
It's probably only worth face value, except as a conversation piece / curiosity. All US pennies since 1983 are made almost entirely of zinc, covered with a thin coating of copper. If the coating was never applied at the mint, or someone dipped the coin in acid the silver-colored zinc core will become visible. No circulating US coins have contained any silver since 1969, and pennies were never made of silver because they would have been worth more than dimes.
Pre-1965 silver coins are worth more for the silver than face value.
The coins are face value and have no silver.
These coins contain no silver and are worth only face value.
None of the Eisenhower bicentennial coins made for general circulation contain any silver or are worth more than face value. Only Proof and collectors coins sold from the US Mint are worth more.
The coins are still in circulation, contain no silver and are face value.
Simple answer: The price of silver on the international market got so high that the coins were worth more than face value.
No, the value depends on the purity of silver, which coins you are talking about and the silver spot price. Currently, all US 90% silver coins (quarters, dimes and half dollars dated 1964 and before) are worth in melt value about 21 times face value. The percentage varies if you are talking about 40% silver half dollars (dated 1965-1970) and 35% silver war nickels (nickels dated 1942-1945 with a large mintmark over the Monticello). Of course, if silver were to go back up, they'd be worth more times face value. If silver drops, they'd be worth less than 21 times face value.
With no rare dates they likely are only valued for the silver.
Canada stopped using silver in its coins in 1968. Your quarter is made of nickel and worth face value only.
None of the Eisenhower bicentennial coins made for general circulation contain any silver or are worth more than face value. Only Proof and collectors coins sold from the US Mint are worth more.
These coins are not silver but rather brass. They are worth only face value unless they are uncirculated or have the mintmark "S" on the side of the coin.
The only dollar coins issued in 1980 were made of cupro-nickel, not silver. They're only worth face value.