Which ancient civilization pioneered the practice of 'psychological pricing' by setting prices just below whole numbers (similar to modern $9.99 pricing) to create the perception of better value?

Explore how ancient civilizations developed sophisticated pricing strategies long before modern economics. Despite lacking our digital tools and market research methods, ancient merchants devised remarkable approaches to pricing goods and services. This poll examines one fascinating aspect of commerce that helped shape early economies from Mesopotamia to Rome.

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Ancient Phoenicians, who would price luxury purple dyes at 19.8 shekels instead of 20 shekels
Ancient Egyptians, who priced papyrus scrolls at 4.9 deben instead of 5 deben
Ancient Romans, who marked amphorae of wine at 99 sestertii instead of 100 sestertii
Ancient Chinese, who sold silk textiles at 9.9 ban instead of 10 ban during the Han Dynasty