Board Thread:Questions and Answers/@comment-99.50.82.90-20150809212222/@comment-26044650-20150809213152

You don't need to sell your account, you know. If you don't have the time to play Cookie Run, then just don't play the game - the account will still be there for you if you have the time to play it again.

Besides selling accounts tend to be illegal, and I don't think discussion here on the wikipedia about it is allowed either.