I can offer only my limited experience.
I spent months prior to Mundas looking on eBay within my price bracket and nothing stood out for me. Then there was a zzr600 (30 year old) with 16 k on the clock within my range. It was 35 miles away. I spoke to the vendor and said if I bought it would he deliver, I figured if he would ride it to mine it was likely safe. I went to look at it, liked it and risked it (no DAS Pass at that point),
Insured it the day I passed and loved it since, it was written off for economy reasons when some daft person drove into me. @fastbob helped me mend it and I have done a load of miles on it since, mostly commuting. I still peer out of my work window to look at it, still turn my head as I walk away and have been known to visits it during the day. I adore my bike. If I didn’t bikes hold their value enough that if you get one and don’t like it you can try another. That said I think some people are looked for a unicorn bike and are not prepared to accept little foibles for otherwise perfect.