Is haggling an individualized price? What's stopping companies from allowing arbitrary bids on any item they can choose to reject? What if the future of the grocery store is eBay, a true nightmare.

Culturally, Americans do not haggle and do not to well in cultures where haggling is the norm. It would take a massive cultural shift before negotiating price is even close to normal. Part of this is why so many employees do poorly when negotiating salary during the interview process.

Disclaimer: my father was in the oil business and we lived a lot in the Middle East among other places.

or you will ask bids for your shopping list, and get replies from several retail chains (or, rather their AI agents).