Another very happy 120 series V6 owner here. We bought new a late 2008 model and now have 145,000km. Done Fraser, Birdsville a couple of times, Simpson west to east, outback SA over to Uluru, Darling River Run plus plenty of trips to Qld and down to ACT all from Sydney. All the outback trips have been towing. Easy car to drive.
As other mentioned avoid anything with a vague service history. These motors will go 500,000km with regular servicing. Look out for rust under the rubber seal on the back door as well as a dropping back door or cracks around the hinges. If looking at a Grande look for rust around the sunroof and expect to replace the rear suspension airbags though not expensive.
You may get lucky and find a GXL with an option pack that has down hill assist, traction control, side airbags and some other kit.
Ours has BFG A/T’s, ARB winch bar, aux battery, snorkel, OME 2” lift and a few other bits and around town average 17-18L/100km. Towing a 2T van 23L/100 but doing the speed limit. On the highway not towing around 14L/100. Same as nab I can’t comprehend either some of these fuel figures. Mine are measured with a scan gauge and on the computer with fuelly. Disregard the figures in my signature.
I would look for something with around 150,000 to 180,000km personally but the higher the Kay’s the cheaper they are. Best thing about this model is there like arseholes, everyone has one so you may also get a shopping trolley and have a blank canvas that has never been off-road but then one with some accessories has already taken the financial hit.