This page contains few business Idea that can be implemented and related reference links that can be useful.
Idea 1. Sabjiwala.com
Having an online site for vegetables and fruits where you can see day to day price for the vegetables as well as buy online.
Business model: Depending upon the requirement, every sunday/saturday vegie truck can visit the society and sell at Mandi price.
So people are going to get fresh vegie at cheaper rate.
http://www.vegoncall.com/index.php?a=1
http://www.sabjiwala.com/
Idea 2.