Totally right NHC, ive been tried to point out as much as possible, of course you can buy a safe account with part of them. Atm i find the support acc with confirmed informations fair enough.
For the email, there is possibility to setup with support, that, the original email isnt anymore aviable, and they can change it to different in their notes. So Support acc is most important.
As for picking the seller, usually, the speech, and hes replies on the MM/Payment method questions are fine enough to find out hes intentions.