152's are more likely to be the high time aircraft. Flight schools were changing out their fleets every two to four years and so the 150's went into private hands with fewer hours on them, and haven't flown much since. When the 152 production stopped, flight schools were forced to keep what they had and they racked up the hours. Now that many schools have folded (with the insurance problems in '99-2000 lots of schools folded) many high time 152's have fallen into private hands finally. Also schools have finally begun to replace the 152 since there are a couple of new trainers on the market (most notably the Diamond series).
Charles
