How much is a 1902 1 oz fine silver one dollar worth?

You either have a reproduction "coin" sold for its bullion content, or a genuine 1926 silver dollar. At that time the U.S. minted silver dollars for use in commerce. Bullion pieces sold for their silver content weren't issued until the 1980s. Standard silver dollars from that time period will have an eagle with folded wings and the Word PEACE on the back.

Please determine which you have and post a new question with more information.