Re-suggesting the price, as people told me to.

I had this hat before and sold it for Harvest Moon Coupe + 1 bud + 15 keys (sold on the tf2-trader unusual trade server)

Proof: http://imgur.com/a/ePsxr

3.5 + 1 + 0.8 = 5.3

Bought it for SBTWC Big Country (paid 4 buds for it, was first real owner http://imgur.com/a/RYtFU ) + ~16 keys as sweets

Proof: http://imgur.com/a/NLDqP

This is the trade: http://www.tf2outpost.com/trade/17675643

4 + 0.8 = 4.8

Lately it was sold in the mixed offer for misty skull yellow belt.

http://www.tf2outpost.com/item/440,2586189394,110,5 Koga -> Satanic Slaughter

http://www.tf2outpost.com/item/440,2499414384,400,5 Satanic Slaughter -> Koga

The old inactive suggestion is here:

http://backpack.tf/vote/id/537116124cd7b80d0f8b4ab5