Good preselling articles needed

Hello Writers! I need 50 articles on the subject of Bee Pollen. If you are familiar with pre-selling article writing then this job might be for you. I need these articles to be around 400-600 words per article. All articles must be completely unique. I will not accept plagiarism of any kind, so if you are the type of person to copy work and take short cuts, please don't apply as it will just waste both of our times. I am looking for articles on the subject of Bee Pollen. To be specific, these articles will be pre-selling a certain health product within this niche. I will compile a list of keywords and give the winning writer the keywords needed. Keywords need to be placed once in the headline, once in the first sentence and 2 to 3 times sprinkled throughout the article. Again, all articles must be completely unique. This will be on-going work for the writer that impresses me by showing on time submissions and good quality, including spelling and grammar as well as following my instructions. I will provide the training in full to as what I need, so you will have to be good at following and applying instructions. The winning bidder will have the opportunity to work with me on an on-going basis. If I am happy with this initial trial-period - I will increase the rate per article and again, will offer you work on an on-going basis. I am willing to pay for this initial trial-period - $3 an article. However, if I am happy with the work, you are on time and give me good unique quality content - I am happy to pay 4$ an article for on-going projects, and then possibly even going up to $6 an article for the best writers. Thank You in advance, Christian