The value for an American middleman should be in curation and market understanding. "Don't bother selling the metric part here, it fits no local products", or

The value for an American middleman should be in curation and market understanding. "Don't bother selling the metric part here, it fits no local products", or "That meme ran its course already here, nobody's gonna buy a phone case with it anymore." and also "there's already 5000 people selling blue widgets, don't try to jump into that crowded market." A big risk factor is choice paralysis. I know legitimate purchase intent browsing/searching gets derailed when customers see too many choices and lose confidence. Did I specify the wrong search criteria? Am I buying the right one of these 500 near-identical items? Is there a better deal I'm missing? Should I check five other shops? If marketplace sellers practiced good curation, this risk is reducible, but I suspect marketplace platforms prefer large numbers of sellers and massive inventory count to convey vast selections (of things you don't actually want).