Nintendo World Championships cartridge FOUND! Is it WORTH $20,000?!?

Tim from Washington state recently found a rare Nintendo World Championships (NWC) cartridge from 1990. Is it real? And how much is it worth?!
MORE INFO: https://www.reddit.com/r/gamecollecting/comments/ay8jfh/a_friend_of_mine_was_given_the_responsibility_of/
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