It also doesn't help that you have crooks who will buy something authentic from Amazon and knowingly buy a counterfeit elsewhere dirt cheap, then return the fake to amazon and keep the real one. Since Amazon doesn't specialize in any particular field of product and their employees likely don't know

(or even care for that matter) when they inspect returned goods, one can safely presume that Amazon stock is laced with counterfeit goods. Another one of the reasons I prefer not to even deal with Amazon.