Dungeon Explorer I has no manual. Dungeon Explorer II has a cracked case and some wrinkles on the manual. Both have some scratches on the case. They were working on the PC Engine DUO at the time, but I haven't been able to confirm their operation for several years since the PC Engine DUO broke down. Therefore, we have set a more affordable price. Please understand that we cannot accept returns. Please consider purchasing after agreeing to the above. #PC Engine