When I bought my 150M from the flying club with 14000 hours I was of course concerned. But I had been flying that plane for years as a student and then as a renter, so I was well familiar with it's behaviors and quirks, and of course falling under the commercial maint program was a good thing. And the mechanic who had maintained it for years (and would continue to do so) made a good point - after that many hours in that environment, everything has been replaced
The paint was faded, but not super crappy, the interior was well used, and it had a ton of hail dents. But it was always the favorite of everyone, and it was also the fastest 150 - even with 2300SMOH!
As Kirk says, TTAF may or may not factor into the final price and decision so much as you may think.
I am unfamiliar with SID inspections?
