Scammed by an MiddleMan/RSGP buyer

Link to scammer's Sythe profile:

Middleman's Profile: http://sythe.org/member.php?u=240775
Buyer's Profile: http://sythe.org/member.php?u=247062
Briefly explain the trade: Everything went well till the part where i accepted the rsgp to the MM. Everything looked like a real mm was supposed to look like. Ended up scamming for 75m.
How they scammed: Once i accepted the trade they both logged of msn/runescape
Proof that you were not talking to an impostor:

Trade screenshots:

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Who'd have guessed it? They're the same person. :\

Banned them and another small handful of vaders, thanks.