Invest not play... Works out much better ;-)
Commissions - They can be negotiated but with brokers that offer online trading I believe the commissions depend on the trade size as set out by the NSE. I am NOT sure if these can be adjusted downwards on an account by account basis but ask them including SBG.
Greedy when others are fearful. Very fearful when others are greedy - to paraphrase Warren Buffett