I had the same issue with not being able to tell what is from a 3rd party or Amazon.

I assume that sold and shipped Amazon has a greater chance of being real. For example, my wife was looking to buy some masks (I know, give into the fear) but I refused to buy from 3rd parties since I have a low level of trust.

So I built an app to help me and friends quickly tell if from a 3rd party or Amazon. Welcome to try and let me know how it can be better. https://www.trueseller.co