Depends on if you're looking for something meta relevant, it can cost you anywhere from 1 dollar a card to 30 dollars if you aren't buying commons. If you're looking for something specific, call the store and ask.
As far as i have seen, their pokemon cards are better priced than walmart.
Ive came to the conclusion that if you have cards that are ungraded you typically arent going to get much for them. Unless of course you have a really really good card
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