I traded CSGO Shadow Daggers (which as of making this post are about $110 on the Steam Market) for a clean Cauldron Bubbles Samur-Eye. This is the only completed listing I can find for this specific unusual, and the last price suggestion was 2 years ago.

Proof: https://gyazo.com/f75aeb226a48f1a11ca2facc8aed5f7e

EDIT: Adding another pic showing that the knife I traded was actually Shadow Daggers: https://gyazo.com/84812252c4d24e744ff28e466b596d64