Which ancient civilization first introduced a standardized pricing strategy for retail goods with fixed price tags rather than the traditional bargaining system?

The marketplace was the beating heart of ancient civilizations, with complex retail practices that shaped economies and societies. From the agoras of Ancient Greece to the bustling bazaars of Mesopotamia and the grand markets of Rome, ancient civilizations developed sophisticated trading systems that mirror many modern retail concepts. Test your knowledge about these fascinating early retail practices that laid the foundation for today's commerce!

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Ancient Romans, who implemented the 'pretium iustum' (just price) system in their markets around 200 CE
Ancient Egyptians, who used standardized weights for grain pricing in markets along the Nile around 1500 BCE
Phoenicians, who established fixed pricing for their purple dye trade across Mediterranean ports around 900 BCE
Ancient Chinese merchants during the Han Dynasty, who introduced government-regulated pricing around 100 BCE