Which ancient civilization first introduced standardized product pricing in marketplaces, replacing the traditional haggling system with fixed prices for goods?

Before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail systems that revolutionized how goods were exchanged. Many innovations we consider modern actually have roots dating back thousands of years. This trivia question explores one of the earliest retail innovations that transformed ancient commerce and shaped market trends across multiple civilizations.

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Ancient Rome, with the Mercatus Traiani (Trajan's Market) featuring posted prices for imported and domestic goods around 100 CE
Ancient Egypt, where the Royal Marketplace system under Pharaoh Ramses II established fixed pricing for luxury goods in 1250 BCE
Mesopotamia, where Babylonian merchants under King Hammurabi created the first price-marked goods around 1750 BCE
Ancient Greece, where the Agora of Athens implemented the first fixed-price retail system under Pericles around 450 BCE