For Morgan dollars, Carson-City mintmarked coins are common, but some dates are considered scarce and some are rare in the higher grades. But no, not all CC Morgens are rare.
No circulated bicentennial dollars are rare. If it's a silver proof, it will weigh more than a regular Eisenhower dollar, and it will have the mint mark S.
W is the designer's initial (A. A. Weinman). The mint mark location is on the back at roughly the 8:00 position - blank, D, or S. Regardless of mint mark, 1943 is not a rare date for half dollars. As of 01/2009 it's worth $6 - $8 for its silver content.
You could get around $30 for a common date in circulated condition. If it is a rare date and uncirculated you could get thousands of dollars but that is unlikely. They have a silver melt value of around $26. For a specific value, ask about a specific coin (with date and mint mark).
Most silver dollars are worth 15-20 dollars. Certain rare mint marks can increase the value. And, of course, condition is very important.
1957 is not a rare date for Washington quarters. Its value is based on the silver it contains -- as of 12/2008, about $2.50
War Nickel, or silver nickels started in 1942 through 1945. 1942 produced both nickels out of nickel and nickels from silver. The non silver ones do not have the large mint mark while the silver ones have the large mint mark.
Franklin half dollars are not rare or even scarce, if the coin has any wear at all value is just for the silver about $12.00.
The value of a silver dollar varies based on its condition, year, and mint mark. As of now, common silver dollars like the Morgan and Peace dollars, which contain 0.7734 ounces of silver, are usually worth at least their melt value in silver, approximately $20 to $25, depending on current silver prices. Collectible or rare silver dollars can be worth significantly more, sometimes hundreds or thousands of dollars. Always consult a numismatic expert or current market values for precise assessments.
There are several so-called "key" dates: 1879 CC 1884 S 1889 CC 1892 S 1895 no mint mark, proof. Prices can range up to a half-million dollars for superb uncirculated specimens.
All Franklin half dollars are 90% silver with a current melt value of around $12. 1958 isn't a rare date, so in mint condition, it's only worth a couple dollars more.
The value of a 1900 silver dollar, specifically the Morgan silver dollar, varies based on its condition, mint mark, and current market demand. In general, coins in good condition can be worth anywhere from $20 to several hundred dollars. If your coin is in uncirculated condition or has a rare mint mark, it could potentially be worth more. For an accurate valuation, consider consulting a coin dealer or using a reputable coin grading service.
It depends on the year and condition. Common or well worn coins are only worth their silver content, which would be around $26 at current market prices. Coins in better condition are worth more, as are those with a more rare date or mint mark.