Bought it for 19 USD 15$ +4$ Shipment.
But i think it has gone bad... The fuel average has become worst, 3,4 kmpl. With Black Carbon around exchaust and bumper.
I will however get it checked (specially Fuel Trims Values) before replacing it.
Found the Genuine one here. Its for around 18k Rs.
If the culprit is O2 sensor, I will get it changed and share the results.