anyone having a past experience with XS robotics....??

they look to have a good inventory  

http://store.xsrobotics.com/

and  not just RC...much of the electronic components is available for DIY....

Nice site and good inventory!
But there are a couple of other sites stocking similar/ better stuff at lower prices.
Checkout :
http://www.nex-robotics.com,
http://www.robosoftsystems.co.in   etc...

VK's Zippy FlightMax 1800mAh 3S1P 20C costs 850/-
xsrobotic's Rhino 1050mAh 3S1P 20C costs 1067/-
Nex-Robotics 2S 720mAh 2S battery for 299/- & 3S for 399/- (black cover B grade ?)

Just a comparison please. Of course quality matters(like B grade cell).
All cases current stock considered and courier charges extra.

I was comparing stuff like geared motors and dev-boards.
Never even looked at the LiPo prices...

have dealt with them on many occsion components price is competitive in case of robotics and other electronics but rc items cost is very high

i have been tracking nex robotics since 2 years approx..
their web interface is really good.. i love it ...

regarding nex robotics - they are in mumbai - airoli exactly [near to thane]
its a kind of one roof for all electronics parts.. order online and everything at ur place .. i dont know abt their service time...

they have been stocking rc products since years.. but rc market in mumbai didnt pick pace .. very few rc hobbyists in mumbai