Which ancient civilization first utilized the 'psychological pricing' strategy (pricing items just below a round number, like 9.99 instead of 10) in their marketplaces?

Pricing strategies have evolved over thousands of years, with many modern techniques having roots in ancient civilizations. From the bustling markets of Mesopotamia to the trade routes of the Mediterranean, ancient merchants developed sophisticated approaches to determining the value of their goods. This poll explores how one of today's common pricing strategies actually originated in an ancient civilization, showing how retail innovation has truly ancient origins.

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Ancient Rome, where merchants priced items at 99 denarii instead of 100 to appear more affordable to plebeians
Ancient Egypt, where vendors in Alexandria created the '99 deben' price point to appeal to middle-class citizens
Ancient China during the Han Dynasty, where silk merchants priced luxury goods just below round numbers to attract wealthy customers
Ancient Greece, where Athenian agora sellers used 9-ending drachma prices to create the illusion of better value