The deal I mentioned is for Malabar gold coin only.
In my personal opinion buying Bangalore refinery may land us in trouble as they do not have proper reach outside Bangalore.
Only few associated local jwellers.
So better to buy any trusted brand which has branches all over India. Our money would be in safe hands.
Moreover they can't deny buying back their own gold coin.
Losing 1-2% is ok if we get peace of mind.