10 years ago I was working on this problem at Amazon. We were developing methods to normalize all the crap listings and methods 3ᴿᴰ party sellers used to get unique listings when consolidating them was known to drive down prices, which was the original goal.

I had some interesting insights (vendors want to be unique, but need to keep products visible in search, so they typically use a common transformation within their own listings to satisfy both properties), but left before implementation rolled out. Based on current search results, either they failed or the project was abandoned.

I’m shocked at how some categories just contain junk from random brands with unpronounceable names. Want a music player by Sony or even RCA? Those brands have left that market completely for B2B products or are a licensed name on top of some garbage. Now you can get a Zaqe, Picxiul, Lwyinp, Globluum, or Swofy!