Should I add comp & collision?

[David]

As you know, I've done a LOT of work to the CGT. I've got a lot sunk into it, far more than it's "worth". Right now I have liability only on her. I was think I really should have comprehensive & collision. But I'm not sure it makes sence. What do you think? Here are my prices:

Liability only: $135.64/6month
Liability + comp: $178.64/6months
Full coverage: $242.23/6months

Bascially, comp adds $43 per six months and collision with a $500 deductable adds another $63.24. Thoughts?