Update!!
Went to look at it finally. Just under 7 hours round trip.
Everything looks good. Small miscellaneous stuff. The sound dampening material under the hood is sagging and the seat belt casing is missing. Small stuff I can pick up from a junkyard.
The owner did have the clutch replaced 70k miles back. Bad brake sensor on front passenger wheel. She has no clue when the fuel filter was changed, but it looked really clean compared to the rest, so maybe it's been done. She says last she checked, she was getting about 36-38MPG about 3 months ago before she bought the new Lexus.
I don't necessarily HEAR the loping sound of the worn cam, but I think I feel it in the clutch pedal. It's rev-dependent, so it's definitely not a tire or something. I can see the engine shake about 3/4 inch or so at ~100rpm over idle. After that, it smooths.
When getting on it a bit, I do feel a loping vibration in the car. If I rest my foot very gently on the clutch, I can feel it much stronger. There's definitely a bad cam, injector, or unbalanced flywheel.
Drives OK. Drove about 13 miles or so at highway speeds, and 2-3 miles of stop and go.
Also no clue on timing belt, tensioner, or water pump. She's owned it for about 80k miles, so it's likely due for them assuming the last owner MAY have done them at 100k.
I'm trying to source parts and how-tos on these components now, but if anyone could point me in the right direction or ballpark what these issues may cost, I'd appreciate it.
Thx