Destroy the car. Easiest way is to drive it into the water or use a grenade/sticky bomb. Then, you don't call your insurance to replace it. Problem solved. Car gone.
yes the car is gone but my spaces in the garage are still reserved for the missing cars
That's not true, I've got two cars available for delivery when I phone for insurance and my garage is full
Really? So you could have a much larger collection than 10 vehicles, and keep most of them with the insurance company?
Edit: You can't.