Buying online from U.S. company and shipping to Canada

[hutz13]

Forgive me if this has been covered but I did a search and found nothing.

Does anyone know how much the duty is to ship automotive accessories from the U.S. to Canada?

I'v ebeen shopping for a new H2 here and found much better prices on add-ons from online suppliers in the States ... usually the duty or import taxes end up screwing the deal.

Any Canadians care to share experiences?