Hey Mate,
Just don't run behind the Bidding Site most of them are even keep there price equal or higher to price offered by Dealer here in Mumbai.
On Rediff I saw maximum phone price was higher than the Reatil Price. So keep away from bidding instead of, if you are in Mumbai, search at Irla or with local delaer I bet you, you will get lowest price ever (be smart to take bill and genuine warranty)
I will suggest to bid if you are out of time and full with extra money.