Probably my favorite hat I've owned.

There's a two week old seller on the kazotsky at 200 keys. Should give a rough estimate on the last two sales.

http://backpack.tf/profiles/76561197995194055#!/compare/1481068800/1481155200 - seller on the flippin at 80. Sale is no more than ~950

http://www.tf2outpost.com/trade/28698210 - merendas had a b/o of 1000 for a month. The last sale should be very close to that based on b/os.

So that's definitely 3 sales at 1000 or less. The 1150 probably seems high due to the cardbeard. That was resold for about 590 - http://backpack.tf/profiles/76561197995194055#!/compare/1485993600/1486080000 - considering the duped scorching grimm. The cannon is also probably high

And look at b/os on the warpig

http://www.tf2outpost.com/trade/28807068 - under 900 is the current one up for 10 days

I think value here is realistically closer to 900-1000 based on three out of the four sales and the b/os.