Affordable Article Writing

I want 20 articles, the requirements are: - Each around 300 - 400 words, on the topic of anti-aging and skin care - I'll give you a keyword for each article (some keywords may need more than one articles), and you are free to write with any topic around the keyword. I'll have some requirement of keyword (i.e. appear appropriately within the article) - Please also write a 2 sentence summary for each article - These articles will be submitted to article directories - So at the end of each article, there will be two links which link back to my website - Please submit in MS Word format (otherwise please suggest a format) Price and previous work history are my main concern for this project. It is best if you can provide me previous work sample. I'll escrow the money once project is confirmed (or you can suggest if other ways are better). Thanks.