Articles for Photography Website

I am looking for someone to compile / write articles related to a list of different keywords relating to photography and camera products. I will provide the keyword sets and key word density ranges. These articles are for creating content-rich pages to place on a photography related website for the purpose of improving search engine rankings for the entire site. I am interested in creating 10 one page articles, ranging between 500 - 800 words per article, containing the various keyword sets and densities identified by me (some flexibility here). The content does not have to be grammatically or structurally perfect - just have keywords in the headlines and in the beginning and the end of the articles. Again - more for search engines than visitors. I am willing to pay $5 / article, ($50 / 10 articles) Applicable copyright laws must be adhered to as articles must be publishable as original content. Thank you.