Ban Worthy Offense: Trying to sell your Xbox Live Account

We get it, times is hard. Maybe you've had to buy your games second hand, maybe you have to sit on new releases till they come down, but selling your account? How does that work exactly? Or, wait. Are you actually a Nigerian prince in exile that just needs a new XBL account so you're able to access your overseas bank accounts? Oh, sweet. You should have just said that. I'll be rewarded handsomely. Yeah, here's my login.