The Virtual boy, bought it on clearance for $40 and picked up 10 used games for it from blockbuster for $20 total. Main problem with that system IMO was that only 2 out of those 10 games were actually in 3D, the rest look like cardboard cutouts in a 3d plane. (think paper mario only they weren't trying for that effect)
The DS bought it when they came out, the DS fat, Have like 2 games for it with no wish to get more. Only having one of the screens touch seems out of place like if you could only use your mouse on the bottom half of your screen. And the giant gap between the screens is very distracting to me like something is blocking my view