While Elance and other freelance writing services are good, it can be a difficult journey especially in the beginning, because there's just too much competition there. While I'm not exactly "against" those services, it's just my personal opinion that you can find better platforms to sell online. I had constant failures at those sites and started looking for other services, and found a couple. And guess what, just day before yesterday I sold a 700 word article (which I wrote in 20 minutes) for $17.25 on GhostBloggers.
Here's the link: http://www.ghostbloggers.net/?aff=423 (referral link - would really appreciate if you'd use that to sign up if you decide to!) But yeah I can assure you it's a great service. You don't have anything to lose anyway :) I don't mean to push it either, I gave you the referral link just because I genuinely think they're awesome. You can try and see for yourself.
Let me know if you have any questions or anything. All the best!