At the Future Shop in Sarnia they have a clearance games bin where all games ending in $.97 are 50% off and they had a copy of SFIV CE in it for $89.97, so it was only like $45. YMMV of course.
My local FS had Armored Core 4 for 49.97, but it was BOGO Free on the clearance games. All the games looked like crap, though. This was the FS at Empress Walk.