Just before always quoting me and saying my prices aren't realistic or are 5k lower than the market, first go to market and find it out yourself and then correct me. 
My cousin last week bought S4 brand new condition with full box for 33k from a shop at Clifton.
And for M7, I said it "Should" be around 32k, I'm still not sure about it, but Juste asked for the "Minimum" price which I quoted him for both the phones.
And no, I'm not a shop owner.