How to Compare Prices for Retail Arbitrage — Amazon vs Mercari Extension

📰 Dev.to · SHOTA

Learn to compare prices for retail arbitrage between Amazon and Mercari using browser extensions

intermediate Published 5 Apr 2026

Action Steps

Install the Amazon and Mercari browser extensions to fetch prices
Use the extensions to compare prices of the same product on both platforms
Calculate the potential profit by subtracting the buying price from the selling price
Research the product's demand and competition on both platforms to inform your purchasing decision
Test the arbitrage strategy with a small investment to validate its effectiveness

Who Needs to Know This

E-commerce entrepreneurs and online sellers can benefit from this knowledge to increase their profit margins by buying low and selling high on different platforms

Key Insight

💡 Using browser extensions can simplify the price comparison process and help you make data-driven decisions for retail arbitrage