Which ancient civilization first established a standardized retail pricing system with fixed prices marked on goods rather than haggling for each transaction?

The history of retail contains fascinating innovations in how products reached consumers. Long before modern shopping malls and e-commerce, ancient civilizations developed sophisticated commercial systems that shaped economies and societies. This trivia question explores one of history's most influential early retail developments that transformed how goods were distributed and sold across the ancient world.

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Ancient Rome with the Diocletian Price Edict of 301 CE
Han Dynasty China with the 'Nine Chapter' commercial regulations
Ancient Egypt under Pharaoh Amenhotep III's market reforms
Babylonian Empire under Hammurabi's commercial code