It is not a shop but one of my cousin's friend has internal dealing with customs officers and he bids & buys the seized phones from Customs. This is the first time I have approached but as I mentioned in earlier post, my cousin has been using customs phone for the past 3 years and he has been purchasing it at damn cheap price- Note @ 15K; Galaxy Tab @ 8k and Samsung FOcus @ 7.5k etc
As Prateek has mentioned, if you have contacts with customs guys, you can get it at almost half the price and sometimes, even lesser!