Upwork: This website offers a great marketplace for selling just about any professional service. You don't need a merchant account, website of your own or anything else for that matter. All you need to do is be able to provide a high-quality service at a reasonable price. But be informed, you will have to compete with many others that are constantly bidding on open jobs.
Do you knit? Make jewelry? Sew? If so, there are lots of opportunities to sell handmade wares online. As a member of Etsy (), you’ll have your own online store to showcase your items. It’s free to become an Etsy seller, but you’ll pay a fee of 20¢ to list an item with up to five photos for four months. When the item sells, you pay a 3.5 percent commission to Etsy. There’s no limit to how much you can charge, and what you earn is based on how your crafts sell.