What is the value of a 1921 Lady Liberty silver dollar with no letter?

Answer 1

All silver dollars up until the current Sacagawea and presidential issues bore a picture of Lady Liberty.

There were 2 designs struck in 1921; I assume you have the much more common variety that does NOT have the word "Peace" under the eagle on the reverse. This design is normally referred to as a Morgan dollar, after its designer.

Despite its age, your coin is pretty much only worth its melt value of $12 to $14. It would still make more sense keep it or sell it to a collector instead of trying to sell it for its metal value because anyone who buys scrap coins will want to deal in bulk lots. They'll offer far less than its actual value for a single coin.