Well my friend just sold a two for 35k each, I sold one for 36k. You can still see bids going up till this amount on Ebay. Visit grey markets in Delhi or Bangalore (those are the two where I've personally checked), it's available for the same or more. So people are paying a high price for this phone, which is one of the most exclusive in the Indian market, and even on the International market till some extent. So a 12k reduction off the market price for a broken back which doesn't affect the functionality (with a great case to cover it as well) is a decent deal for those who don't want to go through the hassle of international shipping and forwarding. I know it's really not much of a hassle for us net savvy (ugh I hate that term) people, but we tend to overestimate common folk. TE was probably not the right place to put it up I guess.
List it for 24k. You will get a buyer. If not then eventually lower the price according to the responses and market price. At the same time keep trying outside the forum too.