Cheap and Quality Article Writing Needed

Hi, I am in need of five articles on the keyword that I'll provide to selected person. Articles have to be quality, human-written, not spun(!) and ... cheap. One article should contain keyword phrase at least 4 times. They should be 450-500 words long. Permanent work & more volume possible in the future. Budget for these is $10. ($2 per article, I cover RAC fees) Thanks!