Most of my situations are related to computers and electronic equipment. People are pigs and I see some real winners!
As for cars, I see some bad ones but not usually up close and personal.
I do have one example though. It is my 1997 F-250 Light Duty. It came to me as dirty as they come and with lots of mechanical problems as well. I actually disconnected the battery and pressure washed the interior and used a shop vac to suck all the crap out. There was leftover food, shell casings, cigarettes, trash, and lots and lots of rocks and mud. I probably got a couple hundred lbs out of that truck. It was a mess!
The main issues were the fact that it had been neglected overall. It took a lot of TLC to get it back up and running well. I would have never picked this one had I known what I was getting into at the time. I would have picked either an older or newer one for sure and not this odd one model year deal. This is the one with the 7 lug wheels.
I would have also never gotten one that had been this abused. I remember replacing the serpentine belt, thinking that I was doing a good thing by replacing the old and cracked belt. As soon as I released the tension, fluids started to leak. The bearings and seals in the water pump, power steering pump, etc. were so worn and the tension of the belt held the shafts in the seals in such a way that they didn’t leak. Apparently they had worn that way. My belt change became quite expensive with having to replace these other parts.