> Co-mingling is fine for books or, really, the vast majority of products. That in itself is not much of a problem... returns are free. I couldn't disagree mor

> Co-mingling is fine for books or, really, the vast majority of products. That in itself is not much of a problem... returns are free. I couldn't disagree more. One of the big reasons co-mingling works well for Amazon is because many counterfeit items aren't detected by consumers. But just because they aren't detected doesn't mean they don't do harm. If I buy an Apple USB charger, I expect to get an Apple USB charger. I don't have the equipment to check it for loaded voltage sag (check out some videos of knock off USB chargers for examples). However fast it charges is however fast it charges, but I'm still being harmed by an inferior product. If I buy a SpyderCo knife with expensive steel, that's what I expect to get. I don't have the equipment to determine whether something is AUS6 or S110V, so I'll probably just use it and sharpen it as needed. But just because I don't realize I've been sold a counterfeit doesn't mean that I haven't been harmed by an inferior product.