Here's the thing some cars are designed to be useful for 3-6 years. So if you buy a car which is designed to only be good for a limited period of time than if it has over 100k miles it is not worth the effort. At the same time there are some vehicles out there which are designed for professional use which can go 500k with out much issue.
If you were looking at a real jeep (CJ5/CJ7/YJ, TJ, TJ LWB (LJ) and JK models "Wranglers") and not the 4 door SUV I would say 200k isn't bad but I would do a full rebuild on the motor and drive train. The reason being they are classic vehicles and have actual value. The Jeep SUVs however are not worth much. and are really disposable vehicles.
I personally have a 1996 Lincoln Towncar it is a professional Short Wheelbase limousine designed to do 500k+ miles so having one with 150k is fine.
So many generalizations made about vehicles by model.
If the previous owner(s) took good care if the vehicle and you are getting it super cheap then I say go for it. I've seen plenty of the 'reliable' cars out there go to shit before their time because they were lemons from the start or because, more commonly, they weren't taken care of. No leaks, no weird sounds or smells...take it to a mechanic and see if they'll do an inspection on the vehicle for you as this could save you some major headaches down the road.
Thumb rule: 200 000 is the breaking point for most cars.
Unless they're well maintained it's rarely worth getting a car that's driven that far.
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Well vehicles are no doubt designed to last a lot longer than most people keep them for before they sell them on, so 200,000 miles is a lot but it's probably well within the capabilities of it to do that again.
Unless you're using it for some illegal activities and its cheap, I wouldn't touch it.
I have an old 96 chevy pickup that I got got 2k, it had 250kish on it when I got it and 610k now, only thing I ever had to replace was a battery but they generally only last 4-6 years anyways.
Last edited by Zergin8r; 2013-02-09 at 05:17 PM.