My personal experience of being owner of a 1965 Cherokee. Seems like there is always parts/avionics that need to be replaced. However, I am sure there are aircraft owners around who may say they never had to replace parts. Anyways, the reason I bought the Cherokee was because I got to know an older, retired professional pilot/CFI on the field who didn't mind sharing his skills of the trade. And so it seemed to make sense to have a plane available to receive instruction. I am sure there are old timers here on the forum who could chime in and share their insights.