Continue one big article (perfect english required!)

I have one 2600 words article. I need a serious writer with perfect english skills (do not bid if your english is not perfect) to continue the article, by adding more paragraphs. (it should be 4000-4500 words long) I will pay $1/500 words. If you will do a great job, this will be ongoing (and I will increase the payment to $1.5/500 words) Payment will be made only after I will see the results, via Paypal. I will give more details to the winning bidder. I need this to be done ASAP Everything that you write should be unique (will check for plagiarism). Please provide a writing sample of yours. Thanks.