i paid $13,800 for a the early '99 in my sig in july and thought i got a good deal. mine's an XLT and had 125000 miles when i bought it.
rust can be an issue, mine has some on the underbody and the bottom edge of the tailgate. the gussets under the cab floor and bed are bad dirt/salt catchers. rotors vibrate too. and i had to replace the torque convertor and rear brakes. i use it as a work truck. it looks good from 20 feet.