25 SEO articles needed

I need 25 SEO-style articles with good quality written on a one niche. Articles must adhere to the following guidelines: 1 Must be ORIGINAL,unique content, no plagiarism (I will check each article on copyscape) 2 Be written in a grammatically correct and free-flowing style 3 Article body must be 450 - 550 words in length 4 Contain 2% keyword density 5 Copyright and all rights to the work belong to me (You may not publish the work in any way) 6 Privacy - all articles may not to be used for samples to show other clients or keep on your website etc. 7 Payment - paypal preferred I expect this project to be done within 4 days or less. Please include one previous sample of your articles with your bid. I am really looking for someone who can write good articles. Although the maximum budget that I can afford for this project is $2 per article,if you can deliver articles with good quality, I will have many other projects for you in a very long term. Thanks for your time and I look forward to starting a long term working relationship with you.