Maybe the junk yard owner has a reputation for dealing in cash?
Anyway, on the flip side, it is hard to believe that just one guy could kill four young criminals all by himself without getting injured or wounded, then, dismember, transport, and dispose of the body parts.
“it is hard to believe that just one guy could kill four young criminals all by himself”
Well, I imagine he probably got the drop on them and they agreed to be restrained, thinking that he was just going to call the cops.