What is Media?

[Volod]

While thinking about selling this book, and probably using USPS Media Mail to ship it, I asked myself - self, why aren't cards considered media themselves? After all, they are paper stock with graphic imagery and full of textual data, just as books are. Does the PO simply want the profit from first class mail, or does it have some arcane definition of sportscards as not media because they may or may not be collectible? Incidentally, there is no dispute with the postal authorities involved in this inquiry, if anyone is wondering.