Dear Sir/Madam,
I'm very interested in this job. I can perform it by using my great writing skills as I have 5 years of experience in Article writing, Content writing, blogging and ghost writing.
I have read the job description and I'm fully able to meet all your requirements.
Furthermore, I hope that my quality oriented work would make you my permanent client.
My rates are $1 per 100 words (negotiable).