If the seller or previous owner can't provide paperwork that the timing belt and all the small parts needed have absolutely been changed, then I would pass at that price. That bit of maintenance done properly is a bit over 1500. If a old belt brakes at speed, it could be a disaster on a VM 2.8 motor.
I agree here. If there isn't proof of a timing belt job you are going to want to do it immediately if the vehicle is past 100k. If the TB goes, go will most likely crush your rockers. The valves should be fine since the rockers were made to be a weakpoint. Then again, if you are going fast this may not be the case.
Ask me how I know about rockers being expensive to replace? I made the bad mistake of ignoring an obvious water pump failure for months. One day it seized up and the timing belt jumped. Goodbye rockers. The rest of the engine was fine, but damn the rocker job ain't cheap.
Edit: a few things I would like to add. You should always have the EGR valve disabled on this vehicle. Either by unplugging the MAF sensor, installing a SEGR kit, or getting the ECU tuned (highly recommended for engine longevity, turbo longevity, driveability, and fuel economy). Most of the guys with these have the check engine light on because they unplugged the MAF sensor, but you can get around this with an SEGR or a chip tune. The EGR on this thing is not good for the engine, or fuel economy, at all. Plus, the EGR commonly fails on this anyway. It's garbage. You should also ignore the Chrysler oil (0w40) and use proper 5w-40 as recommended by the maker of the engine, not the company that wants to squeeze better EPA mileage ratings with a lighter oil. Speaking of rocker arms, a lot of people are seeing premature rocker wear in these vehicles. Some people in higher mileages have broken rockers for no good reason. In a way, I'm glad mine are brand new.
Also, I hope this doesn't come off wrong since I'm a new forum member, I am thinking about selling my CRD if you want to drive up here and look at it haha. 84,xxx miles with timing belt and rockers already done.