Which ancient civilization first implemented the retail pricing strategy of 'fixed prices' rather than haggling, revolutionizing marketplace transactions around 2000 BCE?

Before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail strategies that shaped commerce for millennia. From the agoras of Greece to the forums of Rome and the bazaars of Mesopotamia, merchants employed innovative pricing techniques, marketing approaches, and retail layouts that would be recognizable to modern business students. Test your knowledge of these ancient retail innovations that laid the groundwork for today's commercial practices.

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Ancient Babylonians, who posted clay tablet price lists outside their shops in the markets of Ur
Ancient Egyptians, who marked papyrus price tags on goods in the marketplaces of Memphis
Ancient Phoenicians, who standardized pricing across their Mediterranean trading network
Ancient Greeks, who established set prices in the agoras to promote democratic equality in commerce