Yeah, it's a good library. What games have caught your eye?

Some random ones I'd recommend: Advance Wars (both), Bangai-O, Castlevanias, Contra 4, Elite Beat Agents, Henry Hatsworth and Monster Tale, Pokemon Gold/Silver remakes, Retro Game Challenge

If you're playing on hardware, most of the systems seem to hold up OK. I've had a couple R buttons go bad, and one touch screen stop working.

No idea how the market is now though. I'm sure like everything a lot of it is stupidly overpriced.