I need a used car. I originally wanted to find a well-maintained Honda or Toy in the 2500 to 3000 price range. I mentioned this to a friend of mine, and he offered to sell me his 2000 ML320 for 4500. I started thinking that this might be a good deal because my friend takes meticulous care of his cars, all dealer maintenance. The car seems to run perfectly; it has 140K on it. The interior is immaculate, with the only issue a little body damage to the left rear quarter panel where someone sideswiped the car. That doesn't bother me since I would plan on driving it into the ground. Is this a good price? Am I going to be made sorry by repair or maintenance bills? I don't know what to do.