I agree with this. I have done numerous prebuys and have seen things WAY worse than a cracked dimple. Last one I did, I found peeling and floating slosh in the tanks. Also found one of the fuel vents fully plugged (there were several leaks that were acting as vents). There is some scarry stuff out there and uneducated buyers would likely be better with a well built plane with LCP parts than some of the horrors I have seen.
I helped a widow sell a 9 at our airport. Guy finds a mechanic for the CI and prebuy. He had never seen an RV before. He looks at the engine for 5 minutes, does a compression test then sits down in a lawn chair and says where is the logbook, as were done.
I felt bad for the guy, so spent a full day doing a prebuy for him. I gave a thorough inspection and reported all issues even though I was essentially selling it. Don't suspect that is common.
I have seen what most buyers are thinking at purchase time and feel all of this resale concern is not realistic. Sure, if you come to VAF every day you would be concerned, but the vast majority of buyers have never heard of VAF and others just do a cursory review and maybe post a WTB.
Larry