You invited me so I assume you have my CV from my portfolio.
I will send you 3 or 4 articles I have written for others, no cost to you.
If you like my work,you can engage me. I need the milestone. I have been burned by contractors, including one from your country. If there is no milestone, there is no deal.
Change your project to range $50 - $750 and I will bid $50. Then you only have to pay in $50 to secure me.
He was just scamming free work.