Beautiful yarn and what a heroic, masterful save, too. I equate this to finding a steal at a thrift store (they're often little more than dumps themselves).
Whatever it portends, I think you've got a winner here.
By the way, someone on this forum once suggested putting wool yarn of dubious origins in the freezer for a day or so to kill any critters (someone correct me if I've got this wrong). Of course, I'd stick it in Ziplock bags first.
Can't wait to see your "dumpster bag"!