From the pics the bus looks ok, but if i were to spend 4k on a bus i would want a money shot to convince me to come and look. Try taking in focus shots of the bus from the front, side(angled) and back. Then climb underneath with your camera and show how solid it is, ie sills, outriggers and floors. Your bus already looks really solid it`s just these shots are out of focus so no detail can be seen and the reflections look wavy.....you asked for honesty