Blockbuster is currently running a trade-in promotion where they are giving a minimum $10 credit for any Xbox 360, PS3 and Wii games as well as a minimum $6 credit on all Nintendo DS games.
This promotion runs from March 10th to March 23rd.
Not a bad trade-in deal especially if you have fairly old games hanging around that you'd like put towards a new game. Maybe Resident Evil 5 or Killzone 2? Just maybe...
For more details, go to www.blockbuster.ca