It's worth more than that.

http://www.tf2outpost.com/trade/25567525 ~ Offered alongside a DP Hazmattenhatten for a Blizzard Ubersternmann = 46 - 26 = 20 keys

Mini for Ubersternmann

No recent sales. Taking 46 as the value.

Mini for Hazmattenhatten

http://www.tf2outpost.com/trade/25769282 ~ B/O of 26 keys

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http://www.tf2outpost.com/trade/25702805 ~ Offered alongside a Miami Pampered for an Aces Brainiac = 42 - 19 = 23 keys

Mini for Pampered

http://www.tf2outpost.com/trade/25723378 ~ B/O of 19 keys

Feel free to counter or support my proofs.