Make money selling stuff on Facebook

How to make money selling stuff on facebook? In few words: download the Facebook app and start selling! Sell all your random stuff, even if it seems to have no value. With enough patience and time, it is possible to buy low and sell high and profit a lot. In other words: it is possible to money on facebook without investment simply by being good at negotiating. Of course, you have to know how to use the app first.