Welcome to the forum from Iowa.
What part of the country do you live? That will have a large bearing on any kind of rust issues.
As for things to look for:
1) If you end you buying it, I would plan on replacing all the fluids: Oil, Transmission, Power Steering, Brake, Differentials, Transfer case if 4WD, Coolant.
2) Air suspension, listen to see if the air compressor runs for just a short, 3-5 secs, after starting the vehicle. If you don’t hear it run at all, the compressor may be dead. If it runs for an extended period of time, you could have a bad compressor or a leaky air bladder on a shock. I’d budget for replacing both parts, shocks and air compressor. That’s about $600-$700. Arnott AS2708’s are good options for the shocks and Arnott has a good compressor. Front struts are possibly needed as well.
3) Many folks disable AFM either through a disabled device, or a tune.
4) The transmission may be at a point that it will need some service. At the minimum pan drop and a new filter.
5) I’d make sure the 3rd row seats are able to be folded and tumbled and removed and then unfolded. They can sometimes have plastic clips that break and won’t let you unfold the seats.
6) I’d plan on getting new plugs and wires.
I’m on my 4th one of these and have had all these issues and still would not want to drive anything else.
