Bought a account from them and everything went well but after 2 years the same account got stolen back by using the sign up information and Riot's account recovery page. My guess is that since now it was more worth they got it back and resold it with higher price since someone is still playing on that account. They do not give you the original sign up information such as email / birth date etc. so they can get the accounts back by using that information if they want even if you change the email and password. Maybe they had some problem with their account seller or something, but it's indeed a big risk to buy accounts from there. If you do buy one be prepared that you may lose it someday.