Only top-notch pieces can be worth hundreds, sometimes even thousands of dollars. The 1976 Silver dollar value is pretty modest, although they are relatively rare. Interestingly, most pieces never circulated throughout the US, and people could see them only in casinos on the West Coast.

Well, it is valid unless we count that one from Philadelphia. Three mints produced Eisenhower dollars, but only the one in San Francisco minted silver coins.