So I got a NES Miracle Piano Teaching System at a thrift store for $20 buks, it has the box, foam, ac, game cart, key overlay, another wire thing and attached to the end is like a piece of plastic with foam... it looks like a maxi pad to me, lol... and like 2 manuals and paperwork... I have NO clue if it complete or how much its even worth... the box is missin the ONE inner flap which cant be seen when the box is closed... I would like to sell it but not sure of its value... anyone have more info on this? Thanx a bunch!