Newegg has 'em for $150. Shipping probably won't be cheap, though, so the lowest price you'll probably get is (unfortunately) EBGames still Newegg. I estimated shipping to my own address and it came to $172.74 with shipping and GST. Maybe Kijiji if you're terribly lucky.
And as game_fanatic mentioned below, they do come on sale occasionally at NCIX. $180 regular price, but it couldn't hurt to watch the site.