I have a friend who is a good "talker" who can convince people. That's the difference between a speaker and a talker in our vernacular. Anyway, friends advised this Talker to engage in a buy and sell business. An example is buying old furnitures or appliances and selling it after refurbishing. Well, she studied the trade and followed the advice. Since she is a good Talker, she could haggle the price to the minimum and she could convince the seller to hold the goods for her (since she has no money for payment yet). And when she finds a buyer, she would bring it to the venue. Most often, her transactions were done that way. So her buy and sell actually is not a business by just brokering. In fairness, she is earning pretty good.