How do you find out how much your world of warcraft card game is worth?

hey since i was a kid i collected card games. I recently found a box of all my cards from childhood while cleaning. I have magic the gathering and i also picked up a world of war craft card game , thought it might be worth a lot of money since there a lot of people that play them now an days. I was wondering because i know nothing about world of war craft or their cards, but how do i find out how much a card is worth for the world of war

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