I would suggest that you stop selling bitcointalk accounts.
Mostly scammers buy accounts to scam people with the registered date.
I don't see any benefit in buying accounts if your honest/trustworthy.
This only benefits the scammers.
This is my thought process as well.
Other than quickly and illegitimately buying trust, what purpose does buying an account have over creating your own?
You can make easy money participating in a signature thread payout. With enough posts you can make your money back and generate extra $$$ on the side