Im really sorry to hear about this Phil , I can imagine how you feel
Too many scumbag parents about who have no idea what their kids are doing and could care less as long as they're out of the house.
all you can do is take consolation that all their lives will ever amount to is getting some slag pregnant and a **** life.
If you sell it they've won , is there nowhere you could build a stand alone garage for it , if you have to start parking it elsewhere you won't enjoy it as much, half of the joy of ownership is just admiring the car