At the moment I have had the bad luck of getting a "Sparkling Snowflake" from the steam christmas badge which is an item from "war thunder", a game I never intend to play.

Even though it appears in my inventory on steam I can't seem to find it in my TF2 outpost backpack, as of such I can't find how to get trade it away easily. How should I go about selling this item? Using a placeholder and hoping people find it?