Numismedia lists the following approximate retail values as of 04/2011:
No mint mark (Philadelphia):
Very worn condition - $16
Moderately worn - $32
Slightly worn - $95
Almost no wear - $328
Uncirculated - $450 to $16,250 depending on quality
"O" mint mark (New Orleans):
Very worn - $17
Moderately worn - $66
Slightly worn - $115
Almost no wear - $434
Uncirculated - $780 to $26,000
"S" mint mark (San Francisco):
Very worn - $17
Moderately worn - $70
Slightly worn - $150
Almost no wear - $508
Uncirculated - $820 to $21,450
These coins are very often called Barber half dollars, after their designer Charles Barber.
DISCLAIMER: The retail values quoted are the best available as of the date shown, but may vary significantly due to changes in the precious metals market. Also the wholesale (buying) price of a coin will be less than the selling (retail) price. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
With no mint mark on the back, about $12 in worn condition, $30 if moderately worn, $100 with little wear.
With an "S", $14 / $60 / $150
With an "O", $17 / $60 / $140
Note that this design is commonly referred to as a "Barber" half, after its designer Charles Barber.
5-7-11>> A 1902 US Barber half dollar without a mintmark in average condition has a retail value of $17.00-$22.00.
Susan B. Anthony never appeared on the US half dollar coins, only the dollar coins starting in 1979 to 1981 & 1999. The obverse design of your 1902 half dollar is that of "Miss Liberty" and is one of the Barber series (1892-1915) of half dollars. In average circulated condition the coin has a value of $14.00-$30.00
A US 1902 Liberty Head Half-Eagle with or without a mintmark (only an "S") is nothing special, circulated coins are $400.00-$490.00.
A US half dollar with a date of 1979 is a Kennedy half dollar not a liberty half dollar. The coin has no silver and is only face value.
It has a metal value of about $10.
Value is for the silver about $2.50
a half dollar
The US didn't strike any half dollars in 1804.
A U.S. half dollar dated 1953 or 1952 is a Franklin half dollar. If it shows any wear, the value is only for the silver, about $10.00. The coins are very common.
A US half dollar with a date of 1983 is a Kennedy half dollar not a liberty half dollar.The coin has no silver and most are only face value.
The value of a US 1964 half dollar in circulated condition is around $10. in uncirculated condition they are worth around $16.
The Franklin half dollar was produced between 1948 and 1963. Please check your coin again. For the value of a 1937 LIBERTY half dollar, see the answer on WikiAnswers for the question "What is the value of a 1937 US half dollar?"
You have a Franklin half dollar - a 1957 proof coin is worth around $25.00.
A US Kennedy half dollar dated 1969 is only 40% silver with a value of about $2.00.
If the coin is a US Kennedy half dollar dated 1974 it has no silver in it and is face value.
The value of a 1966 Canadian silver half dollar is about 8.50 US dollars. In the case of the rare small bead variety, the value is between 1,000 and 2,000 US dollars.
The U.S. half dollar has never been made of gold. What you probably have is a gold-plated 1979 half-dollar. It's not really worth much above face value.
All US half dollars from 1964 to date have Kennedy on them, your 1995 half dollar is face value.
Look at the back of the coin for "HALF DOLLAR" no US dollar coins were struck after 1935.
The 1943 Walking Liberty half dollar is the high mintage of the series with an average value of $5.00 to $8.00 in circulated condition.
Please turn the coin over and check the denomination on the back. It's a half dollar, not a dollar. There's more information at the question "What is the value of a 1946 US half dollar?"