Wanting to purchase this Jeep. 5 speed w 125k miles for $9k. 4 inch lift, aftermarket wheels and tires, upgraded headlights, new bucket style sport seats. Previous owner had it for 2 months but other PO had rebuilt the frame? Also, rust spots on the door and driveshaft/differential (pictures show it). Coolant reservoir was empty. Brakes felt worn and had to used hardly. Any causes for concern here? Thoughts and advice is appreciated.