If you listen, people are trying to help you!!!

I know of no person who would buy a CAT C without knowning or seeing what the damage was unless it was stupidly cheap.

£4000 to you might be bear money but to someone else it is not. Buying the car is the cheap part, maintaining them is the expensive part.

Your advert needs more detail and better photos. No one is trying to have ago at you, just giving you advice!