Attention Content Developers : I need an excellent cheap writer for 20 articles

Hello there, I am in need of an excellent cheap writer for an ongoing project related to herbal medicine. I can pay $1.5 per 500+ words unique article at present. If the quality is really excellent, the pay may increase in future. I don't want any kind of plagiarized article. I would request you to check through online software before sending it to me. I WILL do that afterwards. Payment is through 'PAYPAL'. No escrow, No advance payment. Full payment up on acceptance. After you get the payment, I shall retain the full copyright. In no circumstances, you can publish those or resell them online in kind of form (appraisal, sample etc.) without consulting me. I would like the winner to be available through IMs and via e-mail. You have to answer my e-mail within 6 hours. Please send some samples with your bid, so that I can choose my writer. If this project goes well, I have more works than you can imagine. I need to finalize my writer within 5 days, so please bid ASAP. Warm regards.