Update: An additional F seat opened for sale (making 4 total available) 2 days ago.
At just under T-49 I received the email that the upgrades have been confirmed. A 3rd other seat has been assigned, leaving only 1 left open for sale now, so either someone else bid and was accepted, or a 3rd seat just sold.
I'll enjoy what's probably my last flight in those big white seats. Thanks VX, it was a fun ride while it lasted!