I've started using fakespot.com for every purchase from Amazon, has saved me from making a bad purchase more than once.
One thing that surprises me is that why online stores are not forced to display this explicitly. When you go to brick-and-mortar store, you can almost always look for this label but Amazon doesn't enforce it on their listing.
But nothing is more important than reading the 1- and 2- star reviews, comparing them to similar products, and using judgement.
[0]: https://chrome.google.com/webstore/detail/fakespot-analyze-f...