Games are too addicting. How do i sell an account without giving away info ?

World of war craft...yes i got into it about 2 years ago. And like most people i end up always playing it. Overall its an addiction. Now, i need to get rid of it. Considering i have spent $150 on expansions for this piece of **** life waster, i dont just want to delete it. I want to sell it. How do you do that?