An older fella had a nice little Cessna 172 at my airport for years, one fall he had a heart attack, lost his medical. Was determined he was going to go back to flying though. Why I'm not sure, I doubt he flew more than 5 or 6 times a year and only a few hours. It would have been FAR cheaper to rent.
Just after he lost his medical one of the other pilots at the field called him to inquire about buying it, his kids were getting their licenses and it would be a good 'starter' plane for them to build time on. Offered him a very fair price for it.
The owner was madder than an old wet hen, called me up to chew about it. I agreed it was a very fair offer. He laughed at me and hung up.
When the next edition of the Canadian Pilots Ass'n newsletter came out there was an ad for his plan, listed at about double what it was worth, the ad stayed up for probably 2 years. He still owned it.
He moved it to a tie-down right next to the driveway and put a 'for sale' sign in the window and on a post under the wing. The signs faded from weather and exposure to the sun. He still owned it.
One Saturday morning a younger guy showed up and asked me if I knew anyone interested in buying the plane, he was trying to sell it for his mother following his fathers passing........
The poor old guy had paid in total probably $15,000 in storage, insurance and incidentals over the period of time after he'd lost his medical. He'd turned down an offer of $25k as is / where is.
In the end they sold it to a salvage yard, it had sat untouched for 11 years. I heard they got $5k for it.