Not so much any more.[1] US used vehicle exports are down at least 2/3 since 2008. China is making so many cheap new cars that used US cars are no longer needed.

Most scrapped cars in the US are chopped up into little pieces, run through a separator for steel, aluminum, and everything else, and end up at a steel mill to be made into new steel. In Silicon Valley, the chopping and initial separation plant is at the Port of Redwood City.

[1] https://www.trade.gov/data-visualization/used-vehicle-trade-...