I'm selling my Land Rover Defender 110 - is it worth upgrading the interior to get a better sale price?

I'm thinking of selling my Land Rover Defender 110 and what I really need is some advice regarding the condition of the car. It is in genuine original condition with no added extras, would it be more saleable...

I spilt petrol in my car - what can I use to get rid of the smell?

I spilt a bottle of petrol in the boot of my car three weeks ago. Despite cleaning with shampoo, I still cannot get rid of the smell. Can you advise of any product I could use?