Article Writters / copywriting

I need a few articles written between 500-600 words. The articles will have to outline a specific set of keywords or sentences I am going to provide. Please make sure you have enough resources to provide at least 10 articles/ day. I would be happy with 50 but 10 would be a minimum. I am willing pay between $1,5-$2 /article if you are doing a good job and following my requirements. I will run each article against copyscape to make sure it’s unique in content. For any questions please let me now. Please provide a portfolio with articles you have written. I strongly prefer native English speakers. Thank you