hello,
        i am searching for 40 Amps esc at cheapest and better quality coast.

http://www.kinetichobbies.com/beatles-40-esc.html

hi.
   thank you for the reply,but can u give more link of indian site.

@shashankkapoor,
Vishalrao, who posted the reply #1, is the owner of kinetichobbies, an Indian hobby store with an excellent reputation. He has what you need.
If you need alternatives, you have to look at the sites of other online stores. There are more than 20 now.
There is a thread on this forum that lists most of them.
Needs a bit of searching, thats all!
Best of luck.

right now 40amp esc is out if stock but we do have good quality 60amp esc which is cheap.
http://robu.in/shop/hobbyking-red-brick-60a-esc-opto/