Counterfeiting is a huge problem across Amazon. Since they started commingling inventory, it's been used by bad actors to launder counterfeit goods.

It's even worse for the Fulfilled by Amazon people-- there have been DVD resellers selling >$40k/mo legitimately getting banned because pirated items are being shipped to fulfill the same listings.

I've chosen to buy from smaller sites to be more assured of quality-- especially for commonly faked items like batteries and replacement parts.