Taxes due on XBoarder shippments
Unfortunately, when an american completes the commercial invoice and includes it with the shipment it reflects value of the shipment.
When it crosses the boarder, customs looks for this Commercial invoice and bills you for the value of the shipment.
The TAXES due are on this value, and not what you pay the seller of the material.
I've had this happen to me many times and there is no recourse for us in Canada on this issue.
Happened to me on warrenty Lightspeed headset repairs earlier this year.