Estimated Trade In Value at GameStop?

With all of the bonuses going on at GameStop, I would love to know how much would I get for all of these items, with all of this items working 100% in excellent condition.

-A Microsoft Xbox 360 Slim 250 GB
-All of the wires to hook it up and play
-5 Wireless Controllers, 3 White and 1 Black, and 1 Red Tiger Skin( 2 of the white controllers are a bit sticky and all of them function flawlessly)
-5 Battery Packs, 3 are rechargeable, 2 are normal battery packs.
-An Xbox 360 Nyko Charge Station
-An Official Microsoft Xbox 360 60 GB External Hard Drive
9 Games
1) Call Of Duty Blackops 2
2) Halo 4
3) Gears Of War 3
4) NBA 2K13
5) Madden NFL 13
6) Call Of Duty World At War
7) Blur
8) GTA 4
9) Rockband 2


I also have a semi working drums, 2 semi working guitars, and a working mic.

http://www.cheapassgamer.com/topic/308892-gamestop-tivpromos-thread-xx-trade-357-games-get-extra-102035-credit-kindle-cards-come-back/

The first few posts have the values. Under the spoiler tags.

http://www.cheapassgamer.com/topic/308892-gamestop-tivpromos-thread-xx-trade-357-games-get-extra-102035-credit-kindle-cards-come-back/

The first few posts have the values. Under the spoiler tags.



Will take a look thanks!

Mods can delete this.