I just bought a 1991 Sundance. The transmission crapped out. If I were to buy a used car over again I would make sure that a mechanic check it out. I don't think that Chrysler/Plymouth makes transmissions that last this long. I did buy this car from a guy that didn't understand the concept of getting an oil change or maintenance. Overall I would have to say, stay away from high mileage non-maintened Sundance. I'm actually in the process of getting rid of it. (I've owned it for 7 days).
I've been so pleased with this car... just keeps taking me everywhere I need to go. Through Mich. ice/snow -- past SUVs that slid off the road. At 140,000 she's starting to rust through along the edges & I needed to replace the head gasket then rebuild the engine 1X, but for the original price of $8,600 plus ~$2200 for the above mentioned repairs, I've had wonderful transportation for over 13 years and incredible mileage. First car -- bought when I came home from the Peace Corps with my "re-adjustment money" and I'm taking her to the end -- hope she lasts til 200,000. By then, I hope there'll be a selection of affordable USA made hybrids!