How old are you, exactly? Please post your information in your profile, it will help us help you a bit more easily.
In short: Prices for airsoft guns are much more expensive in Canada.
You're looking at 250 - 300 dollars minimum for something 'acceptable' as an airsoft gun. There are some gems available for that price, but they go fast.
Go read about Age verification. If you're looking for deals, get verified and come back to the classifieds once your info is pressed through. Otherwise, you'll be stuck paying what Buyairsoft.ca presents.