Historically, the classifieds market was dominated by newspapers and later by platforms like Craigslist and eBay. While Craigslist kept costs low, it still charged fees for specific categories (such as job listings or vehicles), and eBay revolutionized the industry with a fee-based, auction-style model that included shipping logistics.

Facebook Marketplace disrupted this equilibrium by offering a zero-cost listing service for the vast majority of categories. The "free" aspect is the cornerstone of its growth. By removing the financial barrier to entry, Facebook encouraged casual selling—the "decluttering" economy. Users were no longer required to set up seller accounts, verify banking information for small transactions, or calculate profit margins against listing fees. This frictionless environment led to an explosion of inventory, turning the platform into the world's largest virtual yard sale.