I have read everything I can about this subject but always like other opinions. I like this 1998 ovation I found for sale but am concerned about the engine and the plane not flying that much. It has been in a heated hanger its whole life up in the Northeast area and no expense spared MX performed. TT 1300 SMOH 700. Overhaul done 15 years ago. It's original avionics which doesn't bother me as I can get the panel I want. My concern is looking at the compressions over the years they have been slowly going down which is normal. As of 2 months ago they are as follows: # 62 #62 #3 67. #4 60 #5 65 #6 60. They were in the low 70'S 11 years ago at 350 hours SMOH. I know continentals have lower compressions and it doesn't tell you much. What items should be done at prebuy (Boroscope, oil analysis, go fly it for a hour and half then do compressions, etc.)? Anything else to do to protect me in the pre purchase?