I am checking apple's site for the T&C regarding HDFC offer but seems the site is down.Yes, it is the ones listed on Apple's website for 14900 and sold for 12-13k on other websites. If you can sell it off for even 10k, it should be good enough. Also Apple will likely have some bank discount tomorrow, presently it is 6% cashback on HDFC up to 10k.
In short, it is not worth buying any iPhone on Amazon this season. Flipkart or Apple depending on what you want to buy.