How much could I get for this?

2 year old Xbox 360 Pro with 15 GB of memory, 2 Controllers, One Wireless and One Wired, One Wireless Controller Charger, Power Strip, RCA Connector, Saints Row 2, Borderlands, Battlefield Bad Company Two, Fable, Sniper Elite, Mercenaries: Playground of Destruction, Oblivion Game of the Year Edition, Fallout 3, and Dragon Age Origins. How much would all of this cost, and would asking for $250.00 be unreasonable.