1 Antiques/collectibles dealing Know your stuff when it comes to certain kinds of collectibles? If so this can be a great way to make money from a hobby. Trading sites such as eBay make it easier than ever to reach your target market, according to Trent Hamm, author of US money-saving blogthesimpledollar.com. "I had some success with this myself in the past, trading cards and video games," he says.