Just to throw in a couple thoughts.

1. Kids in particular (but adults too) have fun opening packs of cards and pulling things like this. I've done it with my son many times and he gets a real thrill out of pulling one, even if not a superstar. And the sets that include game-used cards typically include autographs too, so there is excitement about those too. It's a fun and harmless kind of gambling.

2. I, for one, have serious storage limitations on my ability to store bats. (Less about the space we have and more about the way my wife wants to use our space.) A little collection of cards is easy to store though. And they're easy to display too.

3. Although some of the prices are really out of whack, game-used cards are, in general, a much more affordable way to obtain a piece of a favorite player's gear.