Aren't the price differences relative to the amount of the yard's "investment", to a degree?
If it's an old style junkyard where they aren't sure, and there's acres of stuff, then the lower end prices are right. If it's a newer place with recycling programs, pollution control measures, online presence and stock records, then the higher prices are more correct.
I've gone 20 miles across town only to find yard operators can't translate the date codings and their product is not at all what I wanted. Who knows this won't be the case?
If they can read you the D- or E- code off the log, then it's a start. Also find out what you get for the $60. If it includes a rocker assembly and thermostat housing, say, the value is better...