Looking for long term writer on bee pollen pre-selling articles

Hi, I need 50 articles on the subject of bee pollen. These articles will be 400-600 worods per article. **All articles must be original and completely unique.** I will check for plagiarism through various means so if you're the type of person to take short cuts, don't waste my time by applying. The articles will be pre-selling a certain health product within this niche. I will provide a list of keywords that will need to be placed in certain locations throughout the article according to my instructions. I am looking for a long term deal, so this will be on-going work for the writer that impresses me by showing on time submissions and good quality, including grammar and spelling. I will provide detailed instructions and training, so you will have to be good at following and applying instructions. I am willing to pay $3 per article during this trail period. If I am happy with the work, you are on time and provide good, unique, quality content, I will be happy to pay $5 per article, maybe even more if you are truly good. Please provide sample(s) when making a bid. Thanks. Joakim Olsson