I was wondering what the Rarest and Most Valuable G.I. Joes were? I was Hoping to Collect them.I think I know most of the American Ones but was wondering if there was a list in case I missed any?Also International.I don't know much about International but might consider collecting them.Right Now I am Focused on American 3 3/4 Inch Joes.Any Help is Greatly Appreciated. Thanks