Hi
Had a quick look at your site. Looks good well done.
As for the domain I cannot see any potential value at all to be honest.
I actually have a Rover as my second vehicle and it has been very good to me and I would not hesitate to ever buy another one should they still be making them.
However get it another 10 years or so and they will be virtually all gone and only a few left, that people have decided to really look after and not run into the ground and this is why I don't see any value in the domain as it is like the rover and does not have any lifetime future.
Regards
Gav