3.) Tail pipes - if these are shiney, then you have someone who is likely to have looked after the bodywork. However dirty exhausts don't necessarily mean they don't you just need to pay that bit more attention when going over the condition of the bodywork.
Lol my exhaust pipes are horrible but I probably have some of the best condition paint on here.
Not a hard and fast rule by any means just a very general pointer for someone who is asking for tips. Obviously your motor would fall into the caveat i provided highlighted above in bold
and if he were to look at the condition of your pipes and think 'ey up!' it wouldn't take him long to fathom that the bodywork was immaculate