I have 185k on my 2.5 (same block as 2.3), no issues except for small oil leak around oil pump (gonna tackle that this weekend).
Look at the windshield from the inside on the upper drivers side. If you see a walmart oil change sticker I would run....lol.
Request all service records or part receipts.
Specifically at that millage I would ask when the following if /or had been replaced:
tie rod ends
Also look underneath the vehicle for caked up dirty oil. Also look around the block from the engine bay for leaks around the head.
Have vehicle scanned for codes.
Turn on the heat and check for wetness on the passenger side floor. You don't want to have to replace a leaky heater core (make sure also that the hoses going to the firewall are connected, some people have leaks and just disconnect the hoses and couple them).
Have I left anything out?
Quality Engineer (Electronics) for Kia Motors
University of Tennessee Electrical Engineering Graduate
2000 XLT 2.5L A/T