I have one of these, but I'm not selling it. I think it's worth it if you're interested in console curiosities, but otherwise, it's a PC and you can emulate it pretty handily. The games are massively expensive, as is the hardware, and I luckily got into it 15 years ago when it wasn't so bad... I've only bought *one* game since then though (and it cost me 80 bucks).
The floppy drives on these things break real fast (mine's still broken) so that already-fixed one mentioned above is probably a good plan if you want one. You can't run a lot of games without the floppy disc, which is really annoying! I can only play about 20% of my collection because the drive is busted. Also the controllers kind of blow!
So that's how I feel about all that! Wahoooo