Ok First go to a site that people trade accounts and say that you are selling a level 70 Human Warrior.Next go to a site that you can buy a account.
Find a level 70 Human Warrior. Then find his name or the id number of the character. Go back to the site that you can sell the account on and post his id number/name, And also post the link to the site where you find the character.Tell them your email or Somthing that they can contact you with.If somone emails you saying they will buy the account , then tell them that they have to tell you the username/password beacause you need to make sure its the right pass.
And thats it