I just sold this hat. I messed up the currency on the last suggestion. My fault. I also added some more proof. Offers are calculated with average of ranges with overpay percentage included.

http://www.youtube.com/watch?v=uT352hdOkz4

http://www.tf2outpost.com/trade/14420177 - My trade was able to sell for 1.3 pure in less than 9 hours.

http://www.tf2outpost.com/trade/14340998 - Previous trade of mine.

Notable offers:

White Smoking Napper's Repite = ~1.2 buds

Blizzardy Waxy Wayfinder = ~1.2 - 1.3 buds

Planets Brigade = ~1.1 buds

http://www.tf2outpost.com/trade/12103099 - Also has a second trade.

Notable offers within a month:

Planets Private Eye = ~1.17 buds

26 keys = ~1.25 buds (declined)

White Smoking Napper's Respite = ~1.2 buds

http://www.tf2outpost.com/trade/14359299 - Just sold the set for a Vivid Plasma Honcho's to http://www.tf2outpost.com/trade/14432816

http://www.tf2outpost.com/trade/14195856 - Poorly bumped.

Notable offers:

NnB Tosslecap = ~1.4 buds (2slow4him)

NnB Noble Amassment = ~1.35 buds (still2slow)

http://www.tf2outpost.com/trade/14194430 -

Notable offers:

Sulphurous Mongolian = Unpriced

Blizzardy Storm Cyborg Stunt Helmet = Unpriced

White Smoking Nappers = ~1.2 buds

I you can see, 1.3 buds is easy to sell for and 1.4 is possible based on the offers.