If you're getting it shipped across the border, there's no way to avoid brokerage fees, GST and PST. Bear in mind, that if the stuff is made in North America, there's no duty under NAFTA, just sales taxes.
Here in Ontario, that's 5% GST + 8% PST.
I just brought in $430 worth of Board and Bindings. Fedex wanted a $15 flat fee, $65 extra shipping and 20% of the invoice for duty/taxes. About $160 extra.
I ended up getting to shipped to a Mail Boxes Etc. place across the border (free from the vendor), paid MBE $10 to receive and hold it for a week, drove down and got it. Declared it at the border and paid about $54 in tax.
Better yet is the exemption you get if you're out of Canada for 48 hours. No tax/duty on goods that you bring back personally under $400
Depending on what you're buying, it might be worth planning a weekend boarding trip to some place in the states, get the stuff shipped to a nearby MBE store, pick it up, ride for the weekend and bring it back tax free. The savings may pay for the lift tickets.