I want a 6ch radio for my quadcopter

Get a flysky ct6b
Get it from ebay or rcmumbai.com
It is the cheapest tx you can get it

I'd bought an avionic rcb6i, facing problems with it. Going to return it.

Try contacting rcbazaar if you haven't and they will be able to help you out

I skyped them, couldn't solve problem

I have a Spectrum Dx6i with Ar6200 + Satellite as well as Orange + Satellite. Would you be Interested?

I have a used flysky FS-T6 with me and will be interested in selling it.  I brought it for Rs 3,000/- plus shipping and am willing to give it for Rs 3,500/- plus shipping, including the Rx and the Lipo.  I have used it for over a year and have enjoyed my flying on it.  As I have upgraded my set I am looking to sell it off.  I have modified it for a 3 cell lipo and will also be giving the LIPO along with it.
If you are interested then do let me know.
Shobhit

Futaba with charger,batt,rx,some goodies  http://www.rcindia.org/for-sale/futaba-t6ex-fasst-tx-with-r6106hf-rx/

flysky ct6b for Rs. 2900, free shipping + more discounts

http://robu.in/shop/ct6b-flysky-2-4ghz-6ch-transmitter-wfs-r6b-receiver-mode-2/