I just sold it for the following:

Disco Team Captain, Professional Australium Knife, Professional Australium Eyelander, and a duped Burning Glengarry Bonnet

Proof: http://i.imgur.com/bHiyk3U.png?1

Team Captain is valued at 112.5

Looking at they're steam market sales this past month, I'm conservatively valuing the eyelander and knife at 40 and 30 keys respectively.

The Bonnet was a bit difficult to price being that it's outdated duped.

http://www.tf2outpost.com/trade/27268706

The bonnet in the above trade, also duped, was recently offered a Death at Dusk Das Hazmattenhatten (88*.9=79.2) for it + an Australium Grenade Launcher and was declined. 79.2 - 19 = 60.2 There were higher valued offers, but they involved outdated unusuals. So again, I'm being conservative.

112.5 +40+30+60.2 = 242.7

I then just rounded up 243. I was the one that proposed the offer so no overpay is applied.

Proof that I offered him: http://i.imgur.com/66Bistw.png?1

There's only four of these in existence. I never saw any others come on the market during the time I had it. If there were recent sales for the others that I missed, then I can include those. Otherwise, my sale should be enough to price it.