Battle Regalia Poppy is going to go on sale eventually, just cause it hasn't before while Taric has had skins on sale
Anyway, updating my list:
NOTE: In almost every sale Riot puts a new skin that was never on sale before. It'll more or less follow the order of the release date. I'm almost 100% certain that all skins released before Jan 18th (except Pharaoh Nasus (02-Nov-2010) and Siren Cassiopeia (14-Dec-2010)) have been on sale already. So, the list below has probably 1 skin from next sale (unless, finally, Pharaoh Nasus or Siren Cassiopeia go on sale).
- Jan 18: Commando Galio (975 RP), Dreadknight Garen (975 RP), Outback Renekton (975 RP), Galactic Renekton (520 RP).
- Jan 24: Lumberjack Sion (520 RP), Vandal Vladimir (975 RP).
- Feb 01: Sakura Karma (520 RP), Sun Goddess Karma (975 RP), Lion Dance Kog'Maw (1820 RP), Djinn Malzahar (975 RP).
- Feb 07: Almost-Prom King Amumu (520 RP), Prom Queen Annie (975 RP).
- Feb 16: Longhorn Alistar (520 RP), Totemic Maokai (520 RP), Charred Maokai (975 RP).
- Feb 21: Vandal Twitch (975 RP), High Command Katarina (975 RP).
- Mar 01: Hextech Anivia (975 RP), Loch Ness Cho'Gath (975 RP), Commando Jarvan IV (520 RP), Dragon Slayer Jarvan IV (975 RP).
- Mar 07: Piltover Customs Blitzcrank (1820 RP), Samurai Master Yi (975 RP).
- Mar 14: Frozen Terror Nocturne (975 RP), Void Nocturne (520 RP), Battle Regalia Poppy (975 RP), Leprechaun Veigar (520 RP).
- Mar 21: Marble Malphite(520 RP), Bandit Sivir(975 RP).
- Mar 29: Kennen M.D.(975 RP), Workshop Shaco(975 RP), Firefang Warwick(975 RP).
- Apr 01: Traditional Lee Sin (520 RP), Acolyte Lee Sin (975 RP).
- Apr 04: Urfrider Corki (975 RP).
- Apr 12: Apocalyptic Brand (975 RP), Vandal Brand (975 RP), Gragas, Esq (975 RP), Time Machine Zilean (520 RP).
- Apr 19: Battleborn Kayle (975 RP), Cottontail Teemo (975 RP).
- Apr 25: Fiddle Me Timbers (975 RP), Dreadknight Nasus (975 RP), Bilgerat Rumble (520 RP), Rumble in the Jungle (975 RP).
1) All skins NOT bolded or underlined were on sale already, is on sale now or was announced to be on sale in a couple days. 2)Underlined: Skins that will never go on sale (legendary or limited like Kitty Cat Katarina and Lollipoppy). 3)Bolded: Skins that will go on sale eventually and probably soon. So, don't buy those unless you really want them NOW (and, if that's the case, don't complain if you bought it and it is on sale like 2 days later).