I am looking at buying an airplane, and over half of them are 'less than 10 hours in the past 2 years'. These are IO-550's based in the SE. "4 hrs in 2016, 5 in 2017, 400 snew in 2006" "no current annual; has flown 3 hrs this year, 10 last year, 700smoh " Is the fear of lifter corrosion/spalling and cam damage that real, or is it a "< 10% thing"? Am I wrong to be concerned? How much to discount what a fair price would be otherwise? None? Full overhaul price? A risk-based discount? Reminder to self: when I get sick or lose medical get a pal to fly plane around a few hours each month.