I'm reconsidering, and might end up getting it... One issue is that the guy only supplies one power adapter, and the set-up of course requires 2. I'll think it over. Also, are there any specifics I could look for that haven't been mentioned?

How much is he asking? And is it a first or second gen Genesis?

If I were a store owner and some kid kept coming in to test shit out without buying anything I'd get annoyed pretty quickly. Yeah, you wanna buy something that works, but this is a fucking Sega CD. You're gonna end up fucking around with it to find out how to get it to work properly anyway. See if you can buy some extra cords and shit. When I worked in a pawn shop a few years ago, there was a lot of that stuff in a box and you'd be surprised at how often you need something from it :O

Yeah, pawn shops tend to have loads of spare cords. Try one of those places and haggle them a bit and you can probably get them to let go of them for a dollar or less.

speaking of great Sega CD games, there's also Sonic CD.

I got the guy down to 25$, which was odd, because a standalone genesis was going 39.99. Unfortunately for me, this was when I was sure the CD part wasn't being read. I guess it just depends who is there when I go back again. As for the second question: It's what ever the one in the second picture of the original post is, 2nd?
It's been two different guys. Both foreign, and plus, it's a god damn flea market stall. I'm sure they don't really care anyway.

EDIT: Thanks for the tip on the cords, there's a few pawn shops on the route there anyway. There's another "retro-gaming" stall that seems like it might actually be part of an actual business, so I'll check there too.

genesii sell for $20-30 by themselves round these parts, with a sega cd mk.2 selling for around the same price.

There's a little game store nearby that is supposed to have a ton of old and new gaming stuff. I'd go and get a sega-cd but I can't see myself playing it much. I brought my psone from home cause I figured I'd play that but it's been sitting in my closet forever.

I got my first-gen Genesis with SegaCD for 12 bucks cuz it didn't have the cords. Then I went to the next stall over and bought the power cords for 3 dollars. :lol

Granted I haven't tested them yet but it shouldn't be that hard to get working.

Went back to the stall, with some test CD's, result was the same "no disc" error. He ended up giving me the Sega CD w.o cords / genesis for free.
EDIT: Camera phone picture of error!

Have you cleaned it up?

I'm working on it, is there anything particular I should look for? Should I bother opening it?