Mexicans in the northern states of Mexico buy goods in US Walmarts (if there are none in Mexico near them) and then sell the goods back in Mexico. Some people make a living that way.
"Mexicans in the northern states of Mexico buy goods in US Walmarts (if there are none in Mexico near them) and then sell the goods back in Mexico. Some people make a living that way."
These are probably the noble "street vendors" mentioned in some of the articles and photo captions.