Which ancient civilization first implemented a form of 'psychological pricing' by pricing luxury goods just below round numbers to create the perception of better value?

Before modern economics, ancient civilizations developed sophisticated pricing and trade systems that shaped commerce for millennia. From the standardized weights of Mesopotamia to the complex market regulations of Rome, pricing strategies varied widely across cultures but often shared surprising similarities with modern approaches. Test your knowledge about how our ancestors determined value and set prices for their goods in the ancient marketplace!

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Ancient Rome, where merchants priced luxury items at 99 denarii instead of 100 denarii to appeal to wealthy patricians
Ancient Egypt, where items in royal bazaars were priced at 9 deben rather than 10 deben to attract nobility
Ancient China, where Han Dynasty merchants used 99 cash coins pricing to suggest imperial favor for their products
Ancient Greece, where Athenian markets used 9-drachma pricing for imported luxury goods to suggest exclusivity