I'm still baffled by the absurdity of values of non-1st print books. To me, their valuation lies purely in the print numbers and not having to do with any key events in the book. As a collector, do I value what happens in the story or do I value print numbers. (that's a rhetorical question, I obviously care more about a true 1st appearance.) Am I supposed to start hoarding facsimile editions here?
I think what we're seeing is the price of true 1st print/1st appearance keys getting out of peoples price ranges and as a result any ancillary book is getting picked up. I've seen it happen with IH180 (though I argue there's value in a cameo appearance), FF49, and now 2nd prints, etc.