High time airframes.... opinions..

Anyone have experiences, good or bad, with high time airframes (10,000
hrs). What Im specifically inquiring about are life limitations or
"frequent" issues on these airframes. Im referring to non-orphaned,
180-200 hp single piston engine frames. Most commonly fitting this bill
would be former flight school aircraft and pipeline patrol.

Im admiring a high time patrol a/c from afar, and while the engine is
fresh, the frame has passed the 10k mark. I had a friend who had a great
deal purchasing such an aircraft a few years ago, but Im sure he didnt
realize much when he sold it. Resale issues aside, what have ye to say?

Dave
PP ASEL