The project one I had initially before this one then restored was sold for $500+. It did take several re listings on eBay and maybe a couple of years but eventually I got more than I was asking. Patience is everything when selling games. If you're trying to get rid of stuff quick then of course it will seem like it isn't selling. If you have a nice game then imo it is worth it to hold out if you can.
Hehe, yeah I know.... I should play some DK in it for a while. That was why I decided to get a DK of some sort in the first place after I sold my original DK. I just have never been much of a Nintendo fan and an I,Robot would look better there. Then I could call it the Atari room.