Mike,
Old age and pressure from the wife! The car had 203,000 miles on it and rust was appearing on the wheel arches. My mechanic bought it from me which proves he thought it was mechanically sound. I spoke to him last week and he is really pleased with it - 50 mpg is hard to beat. The new car is not as economical and this is annoying me a lot. He has an S8 which is not very economical - 12pmg (driving it easy).
Richard