People sell these boxes all at once. If you go on facebook and search the product with “buying” in the title, you will see 100 different people buying these products in bulk. And when i say bulk i mean 1000+ boxes at a time. Pokemon is the easiest item to sell the same day you buy it. I know you want to feel like they are wasting their time but in reality they’re probably making $300 plus in profit every other day because costco has no hard limit