Articles on SEO 2 - open to bidding

I need a few writers with good language skills who can write informative and engaging articles(10) of 800 and 1500 words on various topics. Below are my conditions. 1. Payment is $1.6 per 500 words and will be made every week. 2. Articles should be according to my requirements, well researched and should be unique. 3. I will be communicating mostly through skype and email. You should check your mail frequently and reply to my mails at time. 4. You should confirm the receipt of the task and let me know the time when you will send the completed article, when you receive the task. 5. In case of unavailability, please inform in advance. Payments will be made after you deliver the articles. No money advances and eager to make changes if needed. This will be a long term contract. Extra bonus will be added if your job is satisfied. Thank you.