5x10 researched English articles (native speaker level)

We need 5x10 articles about health, nutrition and fitness related topics. About you: You must be able to write on a native speaker level (gramar, orthography, flow). You must be able and willing to research topics and write unique articles. Your style should show that you are a creative copywriter. Please apply for 10 articles or multiples of 10. You can apply for more than 10 Articles but you have to deliver within 4 days, Please state count of articles, price per article and time for production to be considered. About the articles: Topics have to be researched but there are enough information in the net. Article topic (one per article) and structure of article will be specified. Keywords and keyword density will be specified. Each article must contain at least 750 words. Spun articles won't be accepted. No article rewriting accepted. 95%plus uniquness plagiarism free expected what will be tested professionally. Articles have to be highly informationally and show a level of expertise but shall be written in an attractive manner (info- and edutainment). Should your articles don't fit our expectation regarding the mentioned details of quality you get max. 2 times and 2 days of revision to deliver, i.e. 1 day per revision. About the pricing: We will pay up to 8 USD per article. Quality parameters are clearly stated. We will only pay for work, that fits these criteria. Every hired copywriter sells complete copyrights to us and guarantees not to use or publish the sold articles anywhere else in the web nor use or sell them for any other publishing purpose again. About us: We are a German enterprise, outsourcing our copywriting. This way we can concentrate on project management, therefore you can expect more copywriting jobs since we will prefer to work repeatedly with good copywriters. Include the following sentence within your offer to be considered: "I am capable and willing to deliver high quality unique articles in perfect English!" We don't provide downpayment, since we will only pay for good quality work within the before mentioned quality rules.