Not sure what the argument is all about on the other suggestion, but it seems that everyone chose to ignore the other sales and the slightly inaccurate previous suggestion.

Sold for a max's head + 40 keys ~ 5 buds:

http://www.tf2outpost.com/trade/20595408

Sold for blizzady storm executioner (4.4) + 7 keys ~ 4.8 buds:

Executioner : http://backpack.tf/stats/Unusual/Executioner/Tradable/Craftable/30

Initial : http://www.tf2outpost.com/trade/21921151

Final : http://www.tf2outpost.com/trade/21947142 & http://www.tf2outpost.com/trade/21914698

Sold for miami impaler (~2.3) + c9 dogger (~1.6) + ~.6 pure, ~ 4.5 buds:

http://www.tf2outpost.com/trade/20651498

Sold for PE festive tree (4.3):

http://www.tf2outpost.com/trade/21670806

Sold for burning SnS (4.3):

http://www.tf2outpost.com/trade/19777846

Credits to Unusual Salmon, Polipolop and D00M for the proof. Credits to WHERE YOU AT for the corrected miami impaler sale.