I bought a second hand volvo from Forsyth Street Cars. Asked if a good runner etc. Anyway, I took it right away for a service, garage reported back brake discs were so badly corroded needed replaced right away, also timing belt, drop links, bushes. Do yourself a favour and buy a car from a reputable dealer with attached garage or a warranty.
Also note Forsyth Street Cars break the law by writing Trade Sale on your receipt. This is to try and get out of any obligations but is illegal and can be reported to the governments Consumer Direct.