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There are no live listings for Gut Knife on CSBoard at the moment. Every item here is listed by another player, so supply turns over through the day. You can list your own copy or watch for one to appear.
This is Covert rarity, Minimal Wear wear, phase Black Pearl.
The float window runs from 0 to 0.08. Two copies at the same wear are not the same item: a lower float means a cleaner surface and usually a higher ask. The catalog filters by float, so you can pick the exact copy rather than the first one listed.