If it's really $24 then that's ridiculous... I can understand maybe $15, but that's also the same price you're looking at when buying DLC for other games.

$5~10 - New skins for characters/Item texture swaps in most games

$10~15 - Extra characters (fighting games), new costumes, sometimes a new level (RPG/FPS)

$15~20 -- New levels, occasionally new story with a original arc.

$20~25 -- Expansion, New Gear, etc.

I understand that the value of a dollar is different in everyone's eyes, I'm just stating that the price tag is definitely not worth it for me.