Magic the Gathering cards come to mind! Buying MTG cards from Amazon can be a little risky as there is a non zero chance of getting a box with already opened packs [0]. Customers buy the product, take the valuable cards out, reseal it and return to Amazon. Amazon just throws it in with the rest as they doesn't know how to properly check for tampering.
[0] : https://www.reddit.com/r/magicTCG/comments/omj8jh/amazon_cus...