If that is the cae, then I would tend to think that this is real. Maybe he just estimated the size of the broadside for the listing? Still, Overruns are overruns. I'm not sure that I'd pay $50 for this. Also, if this is the publisher and he starts selling them, those of us that have them will see the value drop. Not that they were expensive in the first place, but if this guy has 5,000 of them in his closet, then the value will be about $3 a piece.
Bill