Import tax will be 5% plus anything over $1000 will be 10% GST on top of that. So 15% on top of whatever price you get for the wheels and tyre combo, plus your shipping. You should be able to find shipping for around $500, and its better to have them all sent at once and be done with it. If you have it sent as 2 items, you will pay shipping twice. Not to mention that customs are very aware of people trying to do this, and you can be charged for it anyways. On top of all those costs will be customs brokerage and clearance fees, which i think are around $200. All in all, if its something you want to do, its definately worth saving a few hundred if you do buy them from the states.