Of course, this doesn’t affect me since I’m waiting until the GoTY/Complete Edition comes out. I’d get Halo: Reach instead since Bungie doesn’t do that GoTY/Complete Edition crap, they just release the extra content on a separate disc [Halo 2 multiplayer disc, ODST].
AV Cable: ~$10 AC Power adapter: ~$40 Halo 3: ~$20 GTA4: ~$20
These are the prices from Gamestop. These are all prices of pre-owned equipment. Note that Halo 3 will drastically lower in price once Halo: Reach comes out in 5 days. The point if you selling it is to get more money than what you would from Gamestop will still giving him a better deal than what he would at Gamestop. I would suggest around $70.