No chance. There are legions of unsold ones at a key, and even 3 ref. If anything the price should be rounded down in due course.

http://backpack.tf/classifieds/search/cold%20killer

The proof? Where did it go? China?

I would post a comment saying "no proof downvote", but that would be mean, stupid, and unexplainatory. Therefore, I will explain why I am downvoting. We need solid, conclusive proof as to why this item should increase in price, not an opinion such as "it looks good" or "it's rare". Also, if you have one in your backpack, and are trying to raise the price to increase your value, well, good luck. Basically, if you refuse to/are to lazy to provide proof or an explaination, I refuse to move my mouse over the ✓ button. Simple.

If you want my advice, close this suggestion before the admins/mods come and you lose rep.

We attempt to document prices, not dictate them.

Please provide proof to support your future suggestions.