Yes, I never write articles myself – not even articles for my website. I've used a lot of oDesk people. Now you have to take the time to find the right ones that are cheap. But if you do enough work, I can tell you that you can find people able to say an original article and rewrite 5 or 6 sentences – all in print (or you can get them to do it online per line, then use Hybrid's takeachance Spinner). All this can cost less than $ 10 for a VA with very good English.
I spent hours (looking for people, training them, etc.) and spent thousands of dollars for odesk. You just have to take the time to find the right ones. Not easy, but it is possible. There are tons of people on oDesk. Some charge high, some charge low.
So if you are in the long run, I recommend spending time on Odesk – if you run out of money and can not spend too much. You can get good deals there. But you have to train them and spend time with them. But if you do not have the time, there are services where you pay more, but you do not have to spend as much time doing all the training and everything. It may be worth it – depending on the value of your time