USPS is processed on this side of the border by Canada Post. It may be because they are a federal agency that they do not care too much about custom fees and let the boxes from USA go-in without taxes. UPS and Fedex are different. For them each box represents another income, custome brokerage that they charge to anybody.
After a bad experience with Fedex ( they charged me $70 for a $200 product from USA, I wonder what happenned with NAFTA!) I always make sure the supplier ships via USPS instead one of those private bloodsuckers.
After a bad experience with Fedex ( they charged me $70 for a $200 product from USA, I wonder what happenned with NAFTA!) I always make sure the supplier ships via USPS instead one of those private bloodsuckers.