well, the whole point of customs taxes is to make it more expensive, or at least the same price as, buying it in Canada. If they didn't do that, everybody would just order from the states and there would be no stores left in Canada.
You have to take into account shipping and customs and then decide if it will indeed be cheaper.
Judging from your other posts asking about boards, I think you should suck it up and buy from a local shop. Then get to know the shop dudes and they will teach you everything you want to know about snowboarding. A local shop that has your back is priceless.