I know some guys here in Canada have a mail box in the states they have their stuff delivered to it,it is about $300.00 a year ,but they split the cost Five ways,and run over and pick up there parts
i have done this a couple of times. i rent a box from ups in watertown ny and have stuff shipped to it but it was a pain due to the 1hr drive there and 1 hr back plus only pcs up to a certain size. so, on one of my trips done i checked into a couple of smaller freight guys and asked about having stuff shipped there and i pick it up, for a price of course. no problem and the cost is flexable, ie; a bottle of expensive canadian whiskey, cuban cigars or some cash, which ever one they want that day.
most shippers are free in the lower 48 so it gets to watertown n/c and if it's not n/c it is cheap. then i try to combine a bunch of stuff from different suppliers and the trip is worth it. a couple of years ago i was doing a build on a car and i needed a lot of stuff. made up my wish list did my due diligence on quality and price and had it all shipped to w.town. took my 24ft enclosed trailer and loaded up. there was a lot of bulky stuff, rear 1/4's, front fenders bucket seats and a slew of smaller stuff. i was nervous getting to customs on the canadian side with the volume of stuff.
your normal questions were asked, where you been, how long away and anything to declare. told what i had just done and went inside to straighten up with all my various bills. i was surprised with how simple it was. it's all duty free and the only charge was the gst which had to be paid anyway. they looked in the trailer and said have a nice day. on the 5-6,000.00 worth of stuff i am guessing i saved 30 to 50% on doing it myself. just something i have done to save $$$.
another trick is if you have stuff coming that is pricey you can hire your own broker at a fraction of the cost of ups. soon as you make your purchase have a copy of the inv. faxed to you and your broker then your broker bills you saving $$$.
now if i buy stuff, summit, jegs and a couple of more i request usps and they say they use ups. i tell them no and then they say, oh, its going to canada we will usps and they know why. this is getting long winded. there are ways to do it.