Around here it's not uncommon to find squares listed for high 4 low 5 digits that are absolute garbage, Bondo over everything and blasted with tractor paint, look it's shiny its worth 8-12k.
My favorite one was a K10 that had a sale sign with 14k. OBO, because square, 4x4, short bed and shiny blue paint from 20 ft away.
It was a short bed conversion that was welded by Ray Charles and probably wouldn't survive a test drive around the block, you could see the high and low spots were the bed sides were welded when you got up to it. 6" lift via 3" blocks and body spacers. As soon as I saw the frame job and weld lines in the paint turned got back in my truck and pulled off before the dude could even come over and say anything. It most likely sold as it disappeared about a month later and haven't seen it since.
I spent 2 years looking for one that wasn't a complete pile of junk locally ended up buy and shipping one in from Washington that was in better shape than anything I looked at here under 10k. I was just looking for a solid cab and frame with a title the rest I wasn't worried about, but everything under 10k was complete garbage. I could have probably got it here and flipped it for twice what I paid.