You will only have this problem if you buy from the amazon market place. If you restrict your search to seller=amazon I would expect you to be pretty safe.
I'm sure this is helps Amazon with logistics, but it also makes it difficult to catch counterfeit goods.
We needed a refrigerator water filter a month back. So I head to amazon and look at different products available, including cheaper. Didnt like the reviews for the 3rd party and went the samsung filter. And I see what they offer is retail price.
I read the reviews and I see a trend on the comments "counterfeit", "counterfeit", and "not real product". And that was from Amazon, on a verified product's line.
So I went to Lowes. They had them in stock for the same price. Except with 0 chance of counterfeit.