Even swap. I have a very nice condition "Montezuma's Revenge" for the Sega Master System. It is CIB. The cart is in excellent condition, the manual is too except for a very very tint tear on the very top, and the box is in excellent condition. I want to trade for a complete CIB Sega Genesis "Outrun" in the same type of condition as my game. Not the 2019 version, but just "Outrun". PM if you have it!