Well, I got this about a month ago in a chest. I was just in aby skilling up, amber light was not capped. I looked at it and said "meh" and kept it anyway. I didn't know how "hard" it was to get fast cast+3 on it until I looked it up. It was free so i'm using it until better options surface.
As hard as tarutaru sash with th+1
Not just because of low probability of this pop, but because some keyer lv 30 that dont open red and blue pyxies probably will pop ahead of you, open the chest and grab the collar before you even peep the chest...