Hey man, I'm not trying to thread crap but your description is a touch misleading. Let's try this instead:
Wonderful modded Xbox, built inside the Crystal case that was never released in the US. Includes a blue crystal & green crystal controller, along with 2 more controllers. The 320gb hard drive can store a ton of games, and you can play pretty much any old school game on this box as well. The Xenium Ice chip is a very nice modification that turns the Xbox into a fully functional media center, capable of acting as a sort of DVR for Xbox games.
I don't remember the rest of the details, but that is a nice modded Xbox, but none of it is LE unless that green controller is an actual Halo controller (won't have an Xbox jewel on the shell, but a Halo jewel instead). I'm probably nitpicking at this point, but I believe in giving extremely accurate descriptions when selling online.
That said, that is a nice modded Xbox worth at least $350+shipping minimum, more if loaded with games & apps. Since I believe it is, I would say your asking price is pretty fair & modded Xboxes are sweet!!!
After reading the specs again, that is definitely a fair price to be asking. Those sold for over $600-700 less than 18 months ago.