Low mileage might be a negative if a rig has been allowed to sit undriven for long periods, without service. If it really looks good inside and out and EVERYTHING works properly,and the tires are less than 6 years old by date codes, and the engine cooling system, brakes, and suspension are in good shape as determiined by a pro truck mechanic, it may be a good deal. Expect fridge and dash and roof A/C etc to need repairs and replacement they are all limited life items. Take your time, do your homework and don't buy on impulse.