This is the kind of offer which nurtures and sustains scams. On the one hand, you have the seller selling something which obviously someone will buy not so he can send money to his grandma but for something far more sinister..

Then you have the buyer who (I'm sure) wants this account to receive money for bitcoins (or for craigslist frauds), fully aware of the reversibility risk and probably even exploiting that risk.

Trading these accounts might not be illegal but then again you have the fraud factor here. The account will almost always be used for fraudulent purposes.

Posts like this should be tagged with the brightest red possible.