PM who can do it. I will select only best reputation users.
As they said above, no one reputed Bitcointalk member will accept your offer, this will surely ruin their reputation once they caught, it's very risky for their side. Okay let say you have that bought account, you may also determine that your account was bought because of the posting history, there are too many possible signs of changes account hand owner and once you've been proven for that, your bought account will on risk too like having negative feedback under your profile.
So I suggest you build your own account, buying or either selling account here was strictly prohibited. There's alink above shared of buying copper membership which good to go if your purpose making announcement thread for your business.
I think you now completely understand the circumstances of buying a Bitcointalk account.