i've gotten a set of the DB prototypes from that guy a while ago, and i'm also the one who won the bid for the grand opening deck.
i think that guy mentioned that it was the last set that he'll let go, at least for a long while.
as for the grand opening, it doesn't have a seal, so only the cellophane was taken away. didn't mind it being opened because the deck is so hard to come buy, have it being not for sale to the public. also, i've been collecting vintage decks so opened decks isn't too much of a concern to me when it comes to rare decks.