Yes! They do cash or store credit. Store credit will get you more back of course but they'll offer you both
You can sell to the store, but not to other players. That has to be done at the Starbucks next door.
While Johnathon is correct, keep note that they only take Magic the gathering and Yu-Gi-Oh cards, it's possible they will take vanguard for they are trying to build a collection.
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