I checked among the threads that the said user created in the past, and I can't even find where a thread of exchange account selling is made by the OP. 
 
And by the way, I was in favour of buying an exchange account when you can just create one for yourself and pass the verification if you truly want to make use of one.
 
At least you were vigilant enough to detect scams when you saw one. If every other person who wants to make a deal with an untrusted user can make the use of escrow compulsory, the rate at which newbies fall into scam traps will reduce.