not as weird as you think IMO. For exact the reasons you state. One is 40+ old, from the "good old days", hard to find and therefore much more collectable, one is readily available in quantities, less collectable, even though it's legit and in much better sound quality.
Back on topic: I'm pretty astonished about the money one could make these days with selling pressings. They seized 150K in a Paypal account.!