Airborne Fuel Pumps Does Anyone Know What The Store Credit Total Value Would Be If I Traded In These Games To Game Stop?

Does anyone know what the store credit total value would be if I traded in these games to Game Stop? - airborne fuel pumps

Medal of Honor Airborne
Turok
Frontlines: Fuel of War
Burnout Paradise
Test Drive Unlimited
Project Gotham Racing 3
Project Gotham Racing 4
Army of Two
Americas Army True Soldiers
BlackSite: Area 51
Juiced 2 Hot Import Nights
Forza Motorsport 2
Crackdown
Battlefield Bad Company
GRID
Sega Rally Revo
The Elder Scrolls IV: Oblivion Game of the Year Edition
Need For Speed Carbon
Need for Speed ProStreet
Ace Combat 6: Fires of Liberation
DIRT
Need For Speed: Most Wanted
Need for Speed Undercover
All these games for the Xbox 360 Thank you for your answers.