Ok so basically the pre owned bundle stock code at gamestation scans up at 2.99 only when it was traded it under this code.
Here is a list of all games that may possibly be under the code to look out for.
IN STORE ONLY!!!!
Gears of war 1
Gears of war 2
Gears of war 1 and 2 double pack
Kung Fu panda and Indiana Jones Lego
Lego Batman and Pure
Burnout paradise (with bikes addon), connect 4 and trivial pursuit
Forza 2 and Viva Pinata
Resident evil 5 (not very likely to be in stock now)
That should be everything, you can try looking in store yourself, or ask at the tills if they have any bundle stock for xbox 360.