I like EBX. I'm pretty sure it's just a fancy name for EBgames, but I've never had a problem with them. I've purchased 5 used games from them, all of which have worked perfectly. Not to mention the Gamecube I also bought from them, what is it now, 5 years ago? And that things still running, as we speak as a matter of fact.
Paper Mario: Thousand Year Door.