If you take a close look at the pictures I'll be betting on buyers remorse.
Paint inside the bed looks to be rattle canned or something. The tailgate open pics show its a shade of green no appearing anywhere else.
You look at the paint under the rear window by the glass trim and it's discolored/dirty - so option a is everything wasn't broken down resprayed, or option b it has been sitting a while and they mightve even done the old wd40 trick to make older paint shine. Whoever did do the paint was lazy, overspray on the frame below the rockers, various other spots.
Then the comment that you need to go through mechanical before driving... well, there's far FAR better cars out there for WAY less money.
PT Barnum was right, as I'm sure someone will buy it