could i sell my tune to someone else?
It depends on whether it is a custom tune or off-the-shelf tune.
If it is a custom tune, it might or might not work for another RA. It could, potentially, cause catastrophic problems on the new car.
If it is an OTS map, it should work on any car. The problem here has more to do with distribution for intellectual property that you don't have rights to. Sure, if you honestly just sell the tune, and delete any copies you have of it, there shouldn't be a problem. If, however, you sell a copy of the tune and keep a copy for yourself, that is unethical and illegal.
If it is a custom tune, it might or might not work for another RA. It could, potentially, cause catastrophic problems on the new car.
If it is an OTS map, it should work on any car. The problem here has more to do with distribution for intellectual property that you don't have rights to. Sure, if you honestly just sell the tune, and delete any copies you have of it, there shouldn't be a problem. If, however, you sell a copy of the tune and keep a copy for yourself, that is unethical and illegal.


