A serious new warning today for any of you selling on online marketplaces. Here are five key things you must check now before you list, sell and ship products on eBay, Etsy or Facebook, or any of the other websites that have fully democratized retail.

Shares of e-commerce platform eBay ( EBAY -8.19%) plunged on Thursday after the company reported financial results for the fourth quarter of 2024. At noon ET, eBay stock was down by 7%, but it had been down as much as 11% earlier in the day.

such as the integration of eBay listings with Meta Platforms' Facebook Marketplace. This partnership aims to broaden its market exposure and drive higher GMV, which rose by 4% to $19.3 billion ...