Hi. Please note that Facebook Marketplace is a free one-stop solution for online sales, but every sale is directly linked to your Facebook account. To create a listing on the facebook marketplace, you must be at least 18 years old and then you can set the price of your item. A potential buyer may offer a lower offer, but you are not required to accept it.So, when you want to buy or sell on the Facebook Marketplace, it turns out to be very easy to ask questions and arrange delivery.