It's not like they planned it and even once they found out... it's probably not the end of the world, especially for the Heritage and ComicLink copies.
I mean, if the dealer who consigned the heritage book, pressed it into a 9.6, there's enough profit there to not really worry about a little bit of competition.
Meanwhile, the owner of the 9.8 is sitting on the best copy of the bunch and might also be sitting on a LARGE profit (if, for example it was he who put the book in that old school holder in the first place.)