To sell the photograph does not automatically mean that 'your' copyright goes with it. In the same way that an artist usually retains copyright after the canvas is sold. This is to stop third parties from financially exploiting your work through their reproduction.
Copyright in itself can be sold, which is what pretty much all Formula 1 teams have done*. (*To third party advertising agents). I am told that Lockheed; who I believe are now 'Boeing' visited the US Courts recently to defend their copyright against photographers/artists/model manafacturers reproducing aircraft in image and model forms without paying for the right to do so, and perhaps not surprisingly, they lost the case.
To sell an F1 photo* (without team approval) is to invite all sorts of unwelcome attention, so the whole affair remains a minefield.