I was going to say I stopped using Amazon after I read that if they have multiple sellers selling the same product using them for fullfillment they just store them all together and pick one at random when you order, meaning you could order from a good store with good reviews and actually recieve a product from a store that uses counterfeits and has terrible reviews.
But just learned they stopped that practice earlier in the year:
In March, we’ll end commingling practices across our supply chain and update eligibility criteria for using manufacturer barcodes. Commingling is when we fulfill customer orders using exact product matches from the closest available inventory in the Amazon fulfillment network, even if that...
sellercentral.amazon.com
Slightly pointless post since it's no longer an issue, but thought I'd share in case anyone else had been put off by Amazon for the same reason. Seems it's now safe to purchase from stores on Amazon with good reviews (which I don't think was always the case).