Article Content Writer needed

I am in need of a writer to write on a variety of topics,suitable for directory submission written by a person who understands the basics of SEO.I need 100 articles Articles must be between 450 and 600 words in length and be targeted towards keywords which I shall provide. I will expect one article per keyword phrase. The maximum I will be willing to pay is a $1.50 per article. Articles must adhere to the following guidelines: 1. Be written in a grammatically correct and free-flowing style according to US English. 2. Contain between 2.0 and 2.5% keyword density 3. Article body must be at least 450 words in length and no more than 650 words in length 4. Be submitted in .txt format 5. Be completely original, no plagiarism (I will check each article)