Copywriter Needed - 200 Articles

I need an experienced copywriter to write 200 articles. All the articles should include 450-500 words. The topic of all the articles is weight loss. The aim of all the articles is to do pre-sell for the same product - an ebook about weight loss. Looking to pay $3 per article. For every article I'll give you the keyword that should appear 11 times in the article. The article should give a real value for what the reader looking for (the keyword), and lead him to our solution. Thus you also have to learnthe benefits and the advantages of the product. The articles must be written in fluent English, without any grammar and spelling errors. You should have excellent English and good writing and copywriting skills. You'll have to write them in your own words and make them unique. All the articles must pass Copyscape 100% - NO plagarism allowed. Looking for long relationship providers.