Indeed it looks legitimate, but in the future please consult the Admin or Moderators before posting links if you are not sure.
Price is the best way to spot a fake usually, and in this case you are right to be concerned at that price differential. Bust most fakes wouldn't ship from Canada
I'm guessing this is a seller not aware of the market price. Usually a KO will be rock bottom cheap and all over the place.
That said, if you receive it and it isn't from Calvin's production, please let me know.