Buy n Sell Ahmedabad

I have a project where I need to grow a group in Ahmedabad. The group is about buying and selling second hand/first hand products in [login to view URL] task is simple, firstly add people into the group who should be a resident of Ahmedabad and not from any other city, secondly should manage the entire [login to view URL] users should be genuine and I also have a search algorithm that checks for fake profiles. I am ready to pay 1.25-2.5 rupees per user, the target is around 4000 users by the end of the month.