half the problem is that these guys are selling such useless and unimaginative crap, nobody in their right minds would want that stuff. whatever they are selling today, they were selling 25 years ago. besides, if i am coming from Rome , London, or Washington DC, what makes you think i can't buy sunglasses where i am from?
The tuna have been fished out so they are hoping to land a whale. The fact that they haven't starved to death or needed to find another vocation lends credence to their theories on the stupidity of Gringos. There should be some kind of basic IQ test before passports are issued.