Not only gasoline, the Canadians I know pick up liquor, consumer electronics and groceries on the American side of the border, and then sneak it back into Canada. I have one friend-of-a-friend who fills a Formula 1-style gasoline bladder in his trunk on most trips to the U.S.
Then there is Pirate Joe's, which resold items in British Columbia, bought from Trader Joe's in the U.S.
https://en.wikipedia.org/wiki/Pirate_Joe%27s
Biting the hand that feeds IT
