I agree..about £6k is right.Interestingly, the details on the Lexus Woodford ad are wrong in a few ways. It says sunroof, which it does not have, it says cloth and it is leather, and it says it has a display screen, which it does not, and the annual tax amount in wrong. And this is a Lexus dealer!
I test drove a more expensive one and it had four of the cheapest tyres I have ever seen on it, and they were brand new. So the advice here is right, you need to look carefully at every car!