Seems fishy
see the exchange rate and also see his wallet balance (left side).. it was zero
Please sign a message [1] from that address to prove that you own that amount
using Inspect Element (or photoshop) is so easy
[1] : Say how much you have in that amount and that you are "iambab" from Bitcointalk then add date
example :
Hi, I am [your name] from bitcointalk,I want to sell my Bitcoin, i have [X] Bitcoin in my wallet,today date is : [date]
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and you must sign the message from the same account that you have your BTC in
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always escorw with this guy