Article writer for Internet Marketing & Social Media article

We need a ghostwriter with a strong background in internet and social media to write articles for us on monthly basis. We will be needing 20 to 25 articles per month. Please bid only if you have experience with this and can show examples of original work done. This is not an article re-writing position the articles must be original content and we will be using our software as well as Copyscape to check that they are indeed originals. Please respond also with your salary expectation for this post. We will be paying $1.75 to $3.00 per article. Also by bidding you agree that once you send me the original articles (remember, no re-writes) all rights to the articles belong to me so you cannot sell, reproduce or re-use these articles in any way or use them as part of your portfolio. Submit your bid only reply if you are serious about doing the job and can show at least 2 examples on the subject matter. Your spelling and grammar must also be very good and you must be able to deliver at least 5 articles a week.