Replying to Xbox 360 feeler

I'm going to camp of champions, and I want a little extra cash, so I'm thinking about selling my Xbox. So i'm not interested in trades at all, unless its something super super sick!
what I have is:

an xbox 360 (the nice one with the hard drive)
the orange box (a sick live game)
call of duty 4
halo 3
a 50 ft ethernet cable
4 controllers
rechargable battery packs (2 i think)
a headset
a remote
my xbox live account which is set up to run until next december, i'll have to check to make sure all my credit card info and stuff is taken off it, so the live account being yours is iffy

I was thinking 400, but let me know what you guys think