Which ancient civilization first introduced standardized retail pricing (fixed price tags) instead of the traditional haggling method in their marketplaces around 2000 BCE?

Before modern shopping malls and e-commerce, ancient civilizations created sophisticated retail experiences. From the bustling agoras of Greece to the grand bazaars of Mesopotamia, early merchants pioneered retail innovations we still use today. This poll tests your knowledge about one of history's most significant retail developments that revolutionized commerce in the ancient world.

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Ancient Egyptians, who listed prices on papyrus tags attached to goods in their royal marketplaces
Sumerians, who inscribed clay tablets with fixed prices for goods in the markets of Ur
Ancient Greeks, who displayed marble price markers at merchant stalls in their agoras
Phoenicians, who painted standardized prices on pottery containing their trade goods