If you trade one of the specified games, you can get the 1200 Points for 99p at both stores. Both stores have different trade-in games. I cannot remember all the details, but here are some.
Game are as follows:
Battlefield: Bad Company (first one)
Army of Two (first one)
Need for Speed: Most Wanted
Dead Rising (thanks to Arasma for that.)
Resident Evil 5
As I find out which games are on the offer, Ill update the post.
OFFLINE ONLY, AFAIK.