Like pcpartpicker but for everything else? I'd pay a few bucks for such a service that respects privacy but collecting no user data and has a perfectly level playing field that actively polices shops.
Eg: review fraud, selling stolen items, counterfeits, inventory comingling, inconsistent return policy, warehouse worker/driver treatment, terrible search/discovery, bad ux, etc.
I'd worry about that problem when it's a reality not before.
The fact that there is not some global “hey i have x for sale” machine readable message bus is sort of crazy to me.
But they seem to have died out