Hi Rajat,
While I don't meet your requirement of hailing from the UK, US, or Australia, I am a native English language writer. I was educated in the UK, and at the moment, am the editor of two Indian education-sector magazines. Apart from this, I am also a regular contributor to a leading news monthly.
I'm placing a bid of USD 100 for 10 articles (~500 words each) at the rate of USD 10/article. Do let me know if you'd like to see samples of my work.