Should be sold for 250 resonance crystals at a vendor or have significantly increased drop rates, it’s absurd how much it costs to craft plate armor between the Profaned Tinderbox and Null Stones to make Sanctified Alloys.
It’s the only rare crafting item that is actually expensive because it’s so hard to get, unlike Gloomfathom Hide, Vial of Kaheti Oils, and Ringing Deeps Ingots which are under 150g on the AH as compared to Profaned Tinderboxes which are 10k gold.