Have been digging into this a little bit lately after ordering a cheap PS4 Pro via an Amazon AU third party seller (that will likely never arrive). I found a thread on Amazon scams which produced the below link. Looks like Amazon really don't care about fake sellers:
https://www.amazon.com/sp?_encoding=UTF8&asin=&isAmazonFulfiā¦
Coming up on 7000 'sales'. 96% negative feedback. Absolutely ridiculous.
https://www.amazon.com/sp?_encoding=UTF8&asin=&isAmazonFulfiā¦
this seller hasn't listed any items and has been inactive for eight months. they're aren't scamming anyone.