Is Dark Vanguard a rare skin?

Excuse me, I'm curious about the rarity of a particular skin in a popular game. Specifically, I'm wondering if the Dark Vanguard skin is considered rare among players and collectors. Could you please elaborate on its status in the community and whether it's difficult to obtain or trade for? I'm interested in understanding its value and how it's perceived by those who are invested in the game's in-game economy.