I think it's actually worse than that. Buying Amazon Basics is pretty much the only way for you to know that the product you're buying on Amazon came from a rep

I think it's actually worse than that. Buying Amazon Basics is pretty much the only way for you to know that the product you're buying on Amazon came from a reputable seller. The commingling of inventory means almost anything else you buy on Amazon could be a low quality counterfeit that came from a random seller.