Which ancient retail tradition is credited with establishing the first standardized pricing system for luxury goods across multiple cultures around 3000 BCE?

Throughout history, different cultures have developed unique retail traditions that shaped modern commerce. From ancient marketplaces to specialized trading routes, these early retail systems were deeply intertwined with cultural practices, religious beliefs, and social structures. This trivia question explores a fascinating historical retail tradition that influenced an entire region's economic development and still echoes in today's global retail landscape.

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The Mesopotamian Temple Economy, where priests set fixed prices for religious offerings and trade goods
The Silk Road Merchant Guilds, which maintained price lists for goods traveling between China and Rome
The Egyptian Royal Markets, where pharaohs decreed standard prices for imported goods throughout the kingdom
The Indus Valley Trading Posts, which used a uniform weight-based pricing system for all commercial transactions