It probably isn't worth it. I bought it for £100 second-hand two years ago, and it wasn't in great condition back then. Now, it's on its last legs - it probably wouldn't survive transit, and it certainly wouldn't get me much.
I might sell a few games, but there's some games (Tales of Vesperia in particular) that are quite valuable, and I don't really want to part with.
Besides, I still have a few games to catch up on - I've yet to get around to playing Halo 4. That'd be difficult without an Xbox.