i will be in india for two weeks is there is a trusted place to buy bitmain product
India won't be a trustworthy place to buy bitmain equipment. If you are looking to travel to buy, you should just go to China. RBI has already raised a hue and cry about it and it is very difficult to get custom clearance for anything mining related these days.
There are no legit, established vendors here in India who can sell you bitmain equipment.