20k sounds cheap and like somone trying to hock it off coz its fucked, or a "dodgy person" or the poor guy is broke and has to sell cheap.
Id feel bloody confidant buying Brian's evo that for sure at least you know its been serviced properly and looked after by someone who gives a shit.
At last get that 20k car thoroughly checked out, and not by the same workshop who has looked after it for the customer.
And, ROFL at your display pic gsrsol!!!!!!!!!!! Bloody crack up ahhaaha