Most of my Jreds I got from eBay as multiple saw deals; I don't think that sellers now offer bundle deals as nearly as often as some of them they used to. I don't recall buying any of them as individual saws, other than the 2171 that I lucked into locally (fortunately the pawn shop didn't know just what they had). The prices were pretty good when I add the winning bid plus the shipping, divided by the number of saws.
I did buy a 49SP from a fellow ASer. And I might've made some trades here (my memory is crap because at the time I joined AS I was drinking very heavily).
Another factor is a couple of the eBay sellers considered old dirty chainsaws not worth researching or testing. One of those deals turned out to be 670WC and a 801 (both were caked with at least 1/4 inch of old chainsaw grunge). Another yielded a 625 that just needed a little attention to free the stuck piston. In the listing the seller said "they act like they might run," which was interesting since every saw was completed clogged up with many years of barn grunge!