Gift cards (physical delivery) from Giftbigindia (read as reliable) at 40% flat!
Add to it Mobikwik 10% for eBay (thrice a month).

Rs 500 worth gift card at Rs 300/- using eBay code EBAYMRN331
(Steps at bottom)

Various stores to choose from:
1. Lifestyle

http://www.ebay.in/itm/Lifestyle-Gift-Card-Worth-Rs-500-/301674784998%3Fhash=item463d37e8e6



2. Shoppers stop

http://www.ebay.in/itm/ShopperS-Stop-Giftcard-Worth-Rs-500-/301674785781%3Fhash=item463d37ebf5

3 Central



http://www.ebay.in/itm/Central-Gift-Voucher-Worth-Rs-500-/301662749357%3Fpt=LH_DefaultDomain_203%26hash=item463c8042ad