quality articles needed of good rates

I am in need of 20 articles on different topics, so I will hire more than 1 writer .. teams are also preferable ... Rate is 2.5$ per 500 words Articles must be free of spelling mistakes, grammar errors and must be correctly punctuated. Articles should be original and unique. Plagiarism is strictly prohibited and will disqualify for payment. Content must pass 100% copyscape premium test. Please include "I agree with your terms" in your bid or pm .. **bidders have to write a short sample article on provided keyword to prove their writing. we need writers urgently kindly co-operate. Waiting for your bids