3 reasons 766:
1) it's a pirated version and they're aiming at people who want to boast they have it first
2) it's the limited edition (which doesn't cost more than the normal one, all that's different is the box) and someone is trying to market it as a rare collectors item.
3) they were Canadian dollars
In the first 2 cases it is indeed a ripoff, but there will always be people stupid enough to fall for such things.