i want buy headmistress Fiora ，is it possible to put it on sell again?
Legacy skin, so nope.
It's a legacy skin, so it may come back on sale. However, since it's a holiday skin, it has a much lower chance of coming back than other legacy skins.
dude don't worry it'll come back but i brought it and i love it!!!
© 2014 Riot Games, Inc. All rights reserved. Riot Games, League of Legends and PvP.net are trademarks, services marks, or registered trademarks of Riot Games, Inc.