I can't find any information on this machine We bought it years ago for the kids and they've been grown and gone for years. I'd like to sell it to someone who would enjoy it but have no idea how to figure out the value-it works-or did last summer which is last time I had it plugged in. It's a full size upright space invaders (or space attack) video game. If have information or know anyone interested in buying please let me know. The price ranges are so much and I cannot find it anywhere.