The open page is personalized build by Facebook with items they believes you’d be interested in, based on the pages you’ve liked and, after some time, any of your viewing, buying, or selling activity within Marketplace. You can message the seller of any item and also place an offer of your choosing. To sell an item, you simply upload a photo, set a name, description, and price, and confirm your location. There is no desktop feature as of now. Marketplace feels like a hybrid between eBay, Craigslist, and Amazon. The company does not plan on charging a fee to conduct transactions. that’s another way to keep people hooked on the company’s mobile app and in turn drive advertising earnings. Facebook does not condone transactions of illegal items like drugs or explosives. It also ban the sale of firearms, animals, and alcohol.