That's a one ounce silver round, so the value varies with the price of silver. As of 20 June 2012, silver is $27.90/ounce.
Please see Related Answers:
Yes. This coin is called a Walking Liberty Half Dollar.
On the front of a Trade Dollar it has Lady Liberty seated facing the left and on the back below the eagle TRADE DOLLAR. A Morgan Dollar has the head of Lady Liberty on the front.
the liberty bell in front of the moon
No Standing Liberty dollars have been made by the US, the only dollar coins struck in 1836 are the Gobrecht dollars which have Liberty Seated on the front and a large flying eagle on the back and they are rare. Look at the coin again and post new question.
The back of the Walking Liberty half dollar has an eagle on it. The sun is located on the front of the coin just left of Lady Liberty.
The woman is Miss Liberty! The coins are often called "Morgan" dollars after the man who designed them. Please see the Related Question.
Silver sells for around $14/oz
Right in front of the right claw along the edge.
Please take another and much more careful look, then post a new question. Franklin halves were made from 1948 to 1963 and have Ben's head on the front and the Liberty Bell on the back. Walking Liberty halves were made from 1916 to 1947 and have Miss Liberty (DEFINITELY not a man!) on the front and an eagle on the back. And finally, they're not pure silver - there's 10% copper in both types.
A picture of Miss Liberty on the front and an American Eagle on the back. The same themes were used on all silver dollars up to 1935, just different designs over time.
Chief Engraver Charles E Barber designed a Liberty Head series for dimes, quarters, and half dollars, 1892-1916. Miss Liberty was on one side. The other side of the dime had a wreath, that of the quarter and of the half-dollar an eagle.