None of my Alibaba partners would risk steal 4000$ consider all of us handle more than 20-40k as orders per day.
You don't have to believe me, simply check the Alibaba feedback system.
Now, if we follow the logic, and not some good paint.exe skills it is obvious that no one with his mind would trust new seller like us in this forum without protection.
You claim that this brand new member (like me) trusted another brain new member with 4000$+ without using security?
Also the very same person have buying topic saying he would only deal thru escrow: https://bitcointalk.org/index.php?topic=5410812
Correct me if i am wrong but, it seems like some unsatisfied "customer" which low ball offer was rejected trying to ruin something we don't even have here (reputation) with "trade" that never happened.
We have many people like this one contact us everyday, that don't surprise me at all.
I just like the power they put in once their lowball offers get rejected.