How much is this Xbox worth? (Rough Estimation)?

2007 Model Xbox 360
120 GB Hard Drive
Internet Adapter
Four white controllers
5 battery packs (3 rechargeable with station, two battery required)
AV and Power Cord Included
Two Profiles (One Gold the other Silver)
$25 worth if MP points

GTA 5
COD Ghosts (Season Pass and Free Fall)
Batman Arkham Origins (+ Deathstroke DLC)
Assassins Creed 2
COD Black Ops (1)
COD Elite
COD World at War
Crackdown (1)
Dead Pixels (Indie Game)
Crash Course 2
Gears of War
Halo 3
Halo 4
Harms Way
Iron Brigade
Minecraft
Rainbow Six Vegas
Saints Row 3
Shoot Many Robots
World of Tanks (Beta)

Mortal Kombat (the movie)

I'd say around 300

Sell everything separately and you'll get a lot more money.