This is more or less a scam. The OP is asking for usernames prior to making an offer. The OP either is more then likely going to negative trust any account you try to sell him.
Deal with extreme caution.
EDIT: If you give the OP the exact amount of posts and activity then he can figure out which account you are selling.
Yes, of course I am asking for usernames... I am only buying accounts from users which pm'ed me directly. ALL BULK SELLERS DON'T HAVE PROOF!
ACCTseller, please remove the negative trust!
BTW: I got Pm's from 12 different members. Everyone wants to sell their account, but only two delivered proof of ownership...