I would like tractability to original manufacturer, as well as any claims for compliance with various safety and production quality standards. Pretty much supplier transparency.
Yeah, I'd like to be able to be able to look into / find who's a member of the bazaar and just fencing products, versus who's selling their own items directly. For example - I wouldn't buy speakers from some random reseller. I'd buy 'em from the original manufacturer, or the handful of "known" resellers that we all know like the big box stores.