How much could I get for my xbox 360?

It has a 250G hard drive (only like 100G right now because I have a bunch of games) and it works perfectly fine. I was also wondering if people would pay more for an xbox that has an account with a bunch of games on it. Games that are installed are Saints Row 3, Assassins Creed II, Minecraft,
WWE 2K14, Dead Rising 2, Dead Rising 2 Case Zero, and many many more.
So how much could I get for the xbox itself and how much could I get for the account and the xbox together?