USA based company, expect duties/taxes/shipping costs to add up probably close to what you can get in country already. Depending on the item it may or may not clear customs.
Best bet is to meet up with one of our age verifiers and gain access to the restricted section of the forums where more information and retailers you will gain access too
Saskatchewan Age Verifier! Contact for more Info.
http://airsoftcanada.com/showthread.php?t=174161 - Honour & Respect your fellow players! #Airsofthonourandrespect