How much would i probably get for my stuff? (guesstimate)?

I have a bunch of stuff to sell before the PS4 Destiny bundle comes out and I don't know how much ill get for this stuff since no one will take me to Gamestop. Please keep in mind i'm a pro member and basically everything I own is in optimal condition including consoles, controllers, discs, and cases.
Ok so here's the rundown. I have to sell:
Xbox 360 Elite 120GB (in almost perfect condition with 1 new sticker on it), GTA V, Borderlands, Saints Row IV, My Sims Sky Heroes, Splinter Cell Blacklist, Assassin's Creed (1, 2, Revelations, and 3), Call of Duty (2, 3, 4, and Black Ops 2), Halo (CE anniversary, Reach, 4, and a limited edition steelbook of Halo 3). I also have some games downloaded on my hardrive but I'm not sure if those count at all (I have NFS Hot Pursuit, Minecraft, CoD Ghosts etc)
Also to sell I have:
Playstation Slim 250GB in perfect condition, NFS (Most Wanted and The Run), RSV2, Skyrim, Call of Duty (MW2, MW3, and Black Ops 2), FIFA 10, Battlefield Bad Company, and LittleBigPlanet2.
If someone would be kind enough to do rough calculations that would be great.