When I looked inside I carefully check out the tires and these are the Pirellis and to drive on those after all these years I would guess that the rubber may not be good but just looking at them they still appeared as new as you would buy brandnew tires today. the first expense would be the changing the tires. I dont really know about the seals but a complete check would have to be carried out.
'Good judgement comes from experience. Unfortunately, the experience usually comes from bad judgement'. - from an Australian Aviation Magazine.