(This is worse than eBay, since you can't even choose your supplier by reputation.)
Also, there's FBA and non-FBA.
Better distinction on the buyer side would go a long way
Of course, Amazon doesn't want any 1 seller becoming too poplular because that means they can stop competing on price.
Ebay works on a trust system, feedback is good/bad/neutral with a short dialogue and rolling seller ratings over a few timescales to help users guage product/seller quality. It works reasonably well.
With Amazon you need to use third party tools to filter out the bots get a similar level of information, but you have to manually wade through a bunch of bad results.
Buying very expensive brands from Amazon is an invite to get a fake since no reputable brand (in the very expensive segment) will use Amazon as a retail channel.
Even with lesser brands you run a super high risk of not getting the real thing.
This story[1] is a reminder of what you're likely wind up with. Upon reading it I was just shaking my head and thinking "I could have told you so"
[1] https://www.theatlantic.com/technology/archive/2019/01/count...