Copy Writer

I am looking for someone with excellent english copy writing skills to write content for a number of my websites and blogs. I will need them to research and write around 300 words per piece in perfect english grammer and in a way that its keyword rich for SEO reasons Depending on the quality of the writing and the price you charge for each piece, there will be regular work. I already have someone who can do the work for 20usd per piece but im looking for a cheaper option Please let me know what you would be willing to charge per piece in your bids