Application for US/UK Article Writer - $20/per article.

Application for US/UK Article Writer - $20/per article.
I need a qualified US/UK article writer to produce high quality and unique content for my business. I'm happy to pay $20 for each 300-500 article and will require over 100 articles to be written per month.
To apply send me a sample article with keyword density being: "dentist london".
This could be a longterm job and your looking at over $2k per month for the right canditate. I look forward to hearing from you.
Regards

Application Questions:

Do you have any questions about the job description?
Well, to start off there is no cover letter box so please allow me to say what I have to say here.
The sample you require can be done but I am afraid it will not be free. I can do 500 words for $11.11 and since you are all too happy to pay $20 for it, you should be even more happy that it will only cost you much less.
Also, when you say that the keyword density is "dentist london" I suppose you mean that is the keyword. For a 500 word piece, I would suggest mentioning it once and no more than 3 times but truth be told keyword density is not at all relevant in today's SEO strategies.
You can set up the hourly oDesk contract for an hour for the sample piece and if you like it, just add more hours to the contract and we can continue with the rest of the 100 articles.
Thank you,
Norman

Have you written articles before in the past?
Yes, please review some samples at:
http://odesk-writing-samples.blogspot.com/
http://normansodeskblog.blogspot.com/
http://nodjp.blogspot.com/
http://normansodeskblog.wordpress.com/
http://prepper-pupil.blogspot.com/
http://greatfoodfinds.blogspot.com/
http://ph-erotica.blogspot.com/
http://bpop-fashions.blogspot.com/
If what I can do is acceptable, I can start ASAP.