Need expert writers for SEO and internet marketing articles

Need 20 articles on search engine optimization and Internet marketing topics. Writer must be experienced and knowledgable in this subject. No re-writes from other websites' archives arerequired. I need only updated and well researched informative articles with a smart and interesting writing style I'll not be interested to pay if I notice grammatical and typos issues in your articles. Need at least 5 articles everyday. The project must finish within 4 days after I award. No delay, no compromise please $4 per article - 500 words.. Lower bid will be prefered though. Place bid with your samples. Bid without samples will be ignored. Thanks in advance