What is the most expensive skin sold on Steam?
What is the most expensive skin sold on Steam? Case Hardened - Blue Gem (Karambit) The Blue Gem edition of the Case Hardened Karambit is the single most expensive skin in the entire game. Not only that, but it happens to have quite an extensive history as well. Years ago, it was purchased for nearly $100,000 by the player Newb Rage.
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