I expect this is mostly European vehicles given shipping costs. Many years ago when I worked in automotive, I learned the following: At the time 15 million cars & trucks were sold each year in the US. 10 million were scrapped out or otherwise disposed of each year. The total number of vehicles was growing in the US by 2 million/year. That left 3 million vehicles/year, which were overwhelmingly going south of the border.
The Germans used to sell their cars which failed the TUV to sell to Poland. In the 1980’s they sold to the Americans looking for a lower cost German car….
“many years ago”
I watch the auctions. Lots of Russian names as buyers for the last 4-5 years.
I recall a Mexican police squad car that had been stolen in the US and driven across the border for a new life ..