Copywriter with good IT knowledge

We are looking for a copywriter who could do review style articles about file sharing/file hosting websites. Initial task is to have 10 articles written about different services and 1 article about all 10 services. The length of those articles could be somewhere between 600 to 1000 words. Deciding factor in this project will be the quality of your work. Please, bid only if you can provide articles in flawless English. Along with your bid, please, provide a sample article written by you (if possible, similar topic to the one we need). We have previously built good relationship with other copywriters and we are providing them with more tasks on long term basis and upon successful completion of this project we might also give you more work. If your bid is below 2$ per article, thank you, we are not interested in you.