I haven't been able to come up with a good idea on a price, but if you have one you'd like to sell, please PM me and let me know what kind of price you want. I'd definitely prefer a complete one with box/instructions and a controller if applicable, and has a working floppy disk-drive.
Mostly I just want to be able to pick up the early Konami games and play them on the system.
If you have a complete copy of Metal Gear, Metal Gear 2, and Vampire Killer please PM me as well.
Thanks!
References: I have over 100% positive feedback on ebay as epic_lotus (177) and on NintendoAge (143), with much of it as a buyer.