I doubt it's just canada. I mean when things like Halo 3 and Call of Duty 4 launched, there was billions of copies everywhere. Retailers sometimes don't want to take risks on borderlands...
I guess it's broken because I saw asstons of Borderlands at my wal-mart. Again it was 69.99$ and I wasn't going to cause a fit at the employees there because I didn't have the time. I had to go to work. I'll swing by tomorrow.