It's in the rules, and in the help docs. However apparently people recently like breaking these rules. Below you can find articles on FK about this. Which is why I am making this. Unless you are trying to get banned don't sell them here. It's not allowed, never has been, and never will be.
http://kotaku.com/5913228/report-ho...box-live-accounts-and-what-they-do-with-them/
http://kotaku.com/5946976/man-loses...f-gives-thief-virtual-smackdown?post=53042868
http://storify.com/blanket/how-my-awesome-twitter-username-was-sto
http://storify.com/blanket/how-my-awesome-twitter-username-was-stolen-by-a-ga
http://news.cnet.com/8301-1023_3-57...-hacking-victim-claims/?refresh=1349133431532
http://www.digitaltrends.com/social-media/blanket-has-twitter-account-stolen/
http://gizmodo.com/5947877/a-serious-security-flaw-lets-hackers-steal-your-twitter-account
http://www.slashgear.com/security-f...teal-twitter-accounts-and-sell-them-01249879/
http://www.techspot.com/news/50360-twitter-login-security-flaw-lets-hackers-steal-your-account.html
http://www.complex.com/tech/2012/10/twitter-security-flaw-lets-hackers-steal-coveted-accounts
This needs to stop because these bloggers clearly don't know how to research our rules they just jump to giving FK a bad name.
http://kotaku.com/5913228/report-ho...box-live-accounts-and-what-they-do-with-them/
http://kotaku.com/5946976/man-loses...f-gives-thief-virtual-smackdown?post=53042868
http://storify.com/blanket/how-my-awesome-twitter-username-was-sto
http://storify.com/blanket/how-my-awesome-twitter-username-was-stolen-by-a-ga
http://news.cnet.com/8301-1023_3-57...-hacking-victim-claims/?refresh=1349133431532
http://www.digitaltrends.com/social-media/blanket-has-twitter-account-stolen/
http://gizmodo.com/5947877/a-serious-security-flaw-lets-hackers-steal-your-twitter-account
http://www.slashgear.com/security-f...teal-twitter-accounts-and-sell-them-01249879/
http://www.techspot.com/news/50360-twitter-login-security-flaw-lets-hackers-steal-your-account.html
http://www.complex.com/tech/2012/10/twitter-security-flaw-lets-hackers-steal-coveted-accounts
This needs to stop because these bloggers clearly don't know how to research our rules they just jump to giving FK a bad name.