In this case, the detail about the two players' autographs makes for a stunning contrast to vagueness about the gamed used bits. One could translate this to mean, "We at Upper Deck are quite sure about the stickers. These two fellas signed a gazillion stickers for us, you betcha, and we had that witnessed and certified and notarized in three places. And those gray jersey pieces? Well, er, um, they came from a locker room somewhere having to do with Major League stuff."
And in a related development, nice don't enhance value.*
*Yes, we know that's poor English. But it sounds tougher than correct English. So we're going to take our Blanton/Street card now, and put it in our Nice Guy Binder. Well ok, we don't have a Nice Guy Binder, and anyway, this card would be too thick to put in a binder. Instead, we're going to use it as a Nice Guy Paperweight.