The World of Online Marketplaces: An Overview of Amazon, Etsy, and eBay. Which one is best? Amazon Amazon is the largest online retailer in the world, with a revenue of $386 billion in 2020. It was founded in 1994 by Jeff Bezos and began as an online bookstore before expanding to include other products such as electronics, clothing, and household items. Amazon's marketplace allows sellers to list their products alongside Amazon's own inventory, giving them access to a massive audience. Amazon charges a referral fee for each sale made through their marketplace, which varies depending on the product category. For example, referral fees for electronics can range from 6% to 45% of the item's sale price, while referral fees for jewelry can range from 20% to 45% of the item's sale price. Additionally, Amazon offers subscription fees for sellers who want access to additional tools and features, such as bulk listing and advertising services. One of the key features of Amazon...