You should have your coin examined in person by a knowledgeable dealer or appraiser to make sure it's genuine.
There are 3 major varieties of 1807 half dollars. Numismedia lists the following approximate retail values as of 07/2013:
Heraldic eagle type:
Very worn condition - $204
Moderately worn - $402
Slightly worn - $700
Almost no wear - $4,560
Uncirculated - $9,060 to $99,380 depending on quality
Bust type, small stars:
Very worn condition - $138
Moderately worn - $510
Slightly worn - $1,140
Almost no wear - $5,554
Uncirculated - $8,750 to $112,500 depending on quality
Bust type, large stars:
Very worn - $121
Moderately worn - $342
Slightly worn - $650
Almost no wear - $4,340
Uncirculated - $8,440 to $106,250
DISCLAIMER: The retail values quoted are the best available as of the date shown, but may vary significantly due to changes in the precious metals market. Also the wholesale (buying) price of a coin will be less than the selling (retail) price. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
50$
Value is for the silver about $2.50
The US didn't strike any half dollars in 1804.
50 cents.
50 cents.
50$
Sorry no 1807 US silver dollars.
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
About $4-5
50 cents.
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.