Which modern pricing strategy was notably used by merchants in Ancient Rome's marketplace (Forum Romanum) to maximize profits?

Before modern retail strategies, ancient civilizations had sophisticated commercial systems. Their approaches to trade, pricing, and customer experience laid the groundwork for today's retail practices. This trivia question explores how ancient merchants used strategic pricing methods that would be familiar to today's product managers. Test your knowledge of historical commerce and see if you can identify which pricing strategy has truly ancient origins!

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Price skimming (charging high prices for new products before gradually lowering them)
Psychological pricing (setting prices just below round numbers, like 99 cents)
Dynamic pricing (adjusting prices based on time of day, customer demand, and market conditions)
Subscription-based pricing (charging recurring fees for ongoing access to products)