There are a handful of online shops in india that provides electronics components. Some of them specilizes in robotics components alone, while some specializes in embedded boards, while some others provides all types of components and boards. The prices of the same component varies greatly among different shops, so it is wise to refer as many shops before making a heavy purchase.
The shops are:
The list may be incomplete. If you know more stores, please share here.

probots is a fraud site dont even try it
probots website number one online cheating frade website. I am ordered some electronic pcb and components October 2012. my order is not despatch, so many online complain in probots website. please dont buy anything this website. http://www.probots.co.in/
I am thankful for the list of sites being shared.
great listing .thanks it help.
i would like to add http://www.electroncomponents.com
thnx achu its really helpful
Reblogged this on mahe's blog.
You might also want to add eNTesla to your list… http://www.entesla.com
Thanks for the info.