Shares of eBay (NASDAQ:EBAY) fell 3.7% Friday morning as investors reacted to Meta's launch of a dedicated Seller app for Facebook Marketplace. Historically viewed as an informal, local yard-sale platform, Facebook Marketplace's standalone "Seller" app introduces tools specifically engineered to siphon professional, high-margin power sellers away from traditional e-commerce platforms like eBay. Meta's built-in AI handles auto-categorization, title generation, and suggested pricing straight from uploaded photos, drastically undercutting eBay on time-to-list efficiency. The new Seller app's unified inbox, task dashboard, and bulk-listing tools plug that operational gap—keeping high-volume merchants natively inside Meta's ecosystem. Related articlesMeta's new seller app hits eBay where it hurts mostCiti pushes back Fed rate cuts to May after blowout January jobs reportAs Claude disrupts stock market, Anthropic researcher warns 'world is in peril'