Legendary Skins Sale

Will there be some kind of Legendary Skin Sale someday? From what i googled, it's only happening when Riot opens the Legacy Vault. The Vault is open. So i want the Eternum Nocturne Skin, it even came out on my Birthday(12/05). But like you know, the Skin is really expensive and for most skins i wait until they are on Sale, because I've already spent loads of money^^ http://pre14.deviantart.net/1165/th/pre/f/2013/308/7/1/eternum_nocturne_wallpaper_by_wacalac-d6szuny.jpg

Sincerely, the next President

PS:Sry for bad Engrish, you can correct my spelling/grammar mistakes