I used to have a Dreamcast kiosk and it was among the most uncomfortable things to play ever. It was too high to sit at and too low to stand. These things are designed to be uncomfortable so people don't play them all day.
Really, you may get Howard's price, but only if you can find two buyers. That's a very narrow market and any buyer who knows there is no competition isn't going to give you more than $50 for it.