What is the value of a walking liberty dollar from 1902?
The walking liberty design was used only for half dollars dated from 1916 to 1947. If it's a dollar coin dated 1902 it's a Morgan dollar. Look at the coin again and post new question.
The walking liberty design was used on half dollars from 1916 to 1947 and wasn't used again until 1986, on 1-oz bullion coins. If your coin is dated 1902 it shows Miss Liberty's head, not the full portrait of her walking, and the coin is called a Barber half after its designer, Charles Barber. Please see the Related Question for more information
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
It's called a Morgan dollar after its designer George T. Morgan. The design was introduced in 1878, several years before the Statue of Liberty was created. The resemblance between the two depictions of Miss Liberty is due to artistic styles of the time, nothing else. There's more information at the Related Question.
Sorry, but there is no such dollar. All silver dollars issued in the period 1878-1921 carried an image of the head of Miss Liberty. They're usually called "Morgan" dollars after George T. Morgan, who designed the coin. In 1902 Morgan dollars were struck at 3 mints. Coins from Philadelphia (no mint mark) and New Orleans ("O" mint mark) both range in retail value from $15 to $25 depending on condition. 1902 dollars from San Francisco…