Yeah I never believe new car salesman, much less used car salesman.
My dad suggested I test drive a 4x4 up here, just to see if the feel is the same, or if its noticeable compared to 2WD (my wifes car steering is what I would call "hard" or "heavy"......its not something wrong with it, its just setup to have a tighter feel than my Infiniti. still turns nice, just feels sportier/tighter. Im thinking this might be waht my dad experienced).
The squirelly front end scares me too. a friend of mine had a similar issue on his Durango, after it had been "repaired" from an accident. Thats what scares me about this truck.
Seems that it might not have been meant to be.......could have explained the decent deal on the truck. CarFax was clean though

so I guess there really is no way to know about accidents and stuff without figuring it out on your own (or paying a 3rd party for an inspection).
-Chris