I normally wouldn't care enough to do this. However, considering I've spent nearly 6 MONTHS selling this hat, I should know more than anyone how to price this.

I won't get into what I bought it for, but it was for much more than the range I'm suggesting. It's not really relevent now anyways since it was 6 months ago.

My most recent trade - http://www.tf2outpost.com/trade/15503873

The only relevant offer is the second to last one, which was a Knifestorm Fuka (3.8 - 4.4 on here currently though it is 8 months old) + 2 keys

Sold mines yesterday for 4 pure as seen here (I added some security shades to go with it but that shouldn't matter) - http://i.imgur.com/hi9k1C0.jpg?1

There was another one on the market a few weeks ago as well.

Sold for a Burning Snaggletooth(4.3 - 4.6 here currently) - http://www.tf2outpost.com/trade/15257927

He was also offered 4 pure at one point.

I tried to be conservative with the high end since the Fuka's price is old and the snaggle was duped, but it's definitely at least 4.