How can you prove that the account works ahead of time?
I think there will be a lot of scammers selling fake accounts, I'm not saying YOU are, but it just seems impossible to verify.
Just wait a few months, there will be a dozen Silk Roads.
What makes it unique right now is the escrow system. Once a few organized crime hackers get to work, it won't be unique any more.
Use clearcoin for escrow.