How much money is a 1971 silver dollar worth?

If it has a picture of President Eisenhower on it, take a look at the coin's edge. You'll see a dark copper stripe indicating that the coin is made out of cupronickel and not silver. In fact, by 1971 silver had not been used in most coins for 7 years.

Bottom line is that unless it's a proof coin in its original package, it's only worth face value. However there aren't many stores or banks that are equipped to take large-size dollars these days so you might simply want to hang onto it as a curiOSity.