Baseball, football, and other sports trading cards can be worth a pretty penny, but there's a sprawling universe of "non-sports" trading cards out there, too. And while none of them can quite match up to a nice Honus Wagner, there's still no shortage of money changing hands over these collectibles.
Here are ten of the most valuable collectible cards out there, but be warned: if the thought of printed bits of thin cardboard selling for thousands of dollars makes your blood pressure climb, you may want to have your meds at hand.
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