Actually I was waiting for Chris to pipe up first so I could get off easy, but he didn't seem to have a lot to say.
The power train, i.e. engine, trany, transfer case, differentials, are usualy in good shape at that mileage if they've been properly maintained. Check for leaks and ask for maintenance records.
Also find out if the heater core has been changed yet. Not a really tough DIY project and only about $40 if your mechanicaly inclined, but upwards of $800 if you take it to the dealer and overdue if it hasn't been changed yet
The steering and suspension will be shot unless its already been gone thru. Idler arm, tie rod ends, ball joints and sway bar bushings. There are 11 lube points on the front end that the "quickie lube" guys seem to have never heard of. When I bought my wifes at about the same mileage it still had the factory shocks so watch for that too.
The fuel pumps are a problem too, never let the tank go much below 1/4 full as the fuel is the coolant for the pump.
Since buying her's at about the same mileage i figure we spend about $250 to $300 a year on repairs, most of which I do myself, which is less than one month payment on a new SUV and she loves it. Never left us stranded so far and I take every chance I get my hands on it and take it off road and beat the sh** out it.