Most of the later model common rail diesels in their 4cly form ie: Hilux Navara being the most common would tending towards injector replacement at those km's.........They are a bit of a lucky dip..........if they have good service records i'd consider one but no history of servicing i'd walk away.
Funny the petrols nowadays seem to be more reliable and less problematic than diesel.
the older spec 120 Prado pre 2006 with the 1Kz motor in diesel seems to be a standout for reliability same goes for the Hilux but in the old shape which are a fairly small sized vehicle though.
Dan