Which ancient civilization first implemented a standardized pricing system in their markets with posted prices rather than requiring haggling for every transaction?

The ancient world had sophisticated retail systems long before modern shopping malls existed. From the bustling markets of Rome to the elaborate trade networks of Mesopotamia, ancient civilizations pioneered retail innovations that would influence commerce for millennia. This trivia challenges you to identify a revolutionary retail strategy from the ancient world that continues to influence modern commerce practices.

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Ancient Rome, where the Forum markets used inscribed stone tablets to display fixed prices for common goods
Ancient Egypt, where papyrus price lists were posted at the entrances to market districts
Ancient Greece, where ceramic tablets displayed pricing at the Agora marketplace stalls
Ancient China, where Han Dynasty markets featured imperial price edicts on bamboo scrolls