Buying a car as a non-resident

Hi Oppo.

ASKING FOR A FRIEND:

If someone that lives in the UK wants to buy a car privately in the US, how would that work?

It seems that the buyer would need a title in his name to export the car (maybe I’m wrong here).

But to title the car, the buyer would need an address in the US (which is not possible).

How would that work? I guess I did not understoond the buying/selling process in the USA...

Thanks for thehelp