While the Lincoln certainly carries a premium, it pales in comparison to the prototype reverse Dollar. Curiously, few of these have been found despite Cheerios' claim that a rather large number were placed in their cereal boxes. They were none-the-wiser to the difference either - featuring more fully defined tail feathers on the eagle's wing. It was later determined that this was a prototype, and not issued to banks or to the public. The unique design of the dollar, combined with pop culture cereal and the hysteria of collectors has kept values high for this little set. - Sacagawea Dollar