[Frost__2001]

Well I can tell you as Chrysler is one of my accounts at work 3 things to watch out for are

1. Oil and tranny leaks are common on the V6's - I don't know why but the R/T models don't have this issue as much unless they are over the 160,000 mark.
2. Excessive wear and tear on the interior body trim pannels as the plastics are extremely cheap and scrach under the lightest of pressure. Also because of the hard plastics in the door trim expect broken arm rests or very worn ones.
3. blown or very weak air conditioning, often thats a sign that the a/c compresser is on its way out.

Also you should make sure that the all the recall work is done as there are a few major ones out there like over heating seat heaters that caused 1st, and 2nd degree burns or caused the car to catch fire, tranny recalls, and something related to the rear 12v outlets shorting out if corroded (which may cause a fire)

Also with the R/t Version it's very common to find the Navagation system if your parents are looking in to having that, just make sure you get the nav disk with the car, other wise it's a $200 replacement disk from chrysler with taxes, one more thing to watch out for is most people who own these wagons never really take care of them and most of the time they are really drive the piss out of, so make sure you get it really checked out as at my work we get a lot of magnums with clams, usually acc/rep w/ struct.