Looking for expert article writers

We are looking for some expert article writers to write articles for us. They will be around hiring freelance professionals in different industries. An example would be "How to hire a freelance iphone developer" or "How to hire a freelance SEO expert" etc. Each article will need to be well researched and of high quality. We are looking to have the articles about 500-1000 words. Please submit your previous work and examples. Please quote how much you will charge for 10 articles.