A 1943 bronze Lincoln cent, a 1944 steel Lincoln cent, or a 1937-D 3-legged Buffalo nickel, are out there — somewhere. And they are rare. Prepare to break open your piggy banks.

A 1943 bronze Lincoln cent, a 1944 steel Lincoln cent, or a 1937-D 3-legged Buffalo nickel, are out there — somewhere. And they are rare. Prepare to break open your piggy banks.