3 of these in existence, all on outpost

http://www.tf2outpost.com/trade/13681889

Sold for 9 buds pure

Unfortunately, they traded back so the sale is retracted.

http://www.tf2outpost.com/trade/13701623

Sold with 2 buds for Miami Nights Ballcap(~9.9 mid price) - Ballcap offered on Headwarmer

10.2 - 2 = ~7.9 buds

http://www.tf2outpost.com/trade/13840086

Sold with Phosphorus Bubble Pipe for Cloud 9 Anger(none priced)

http://www.tf2outpost.com/trade/12863640

Looks to have sold for Anti Freeze Festive Tree(~6.1) + 16 keys = ~6.9 buds

Proof: http://backpack.tf/id/76561198078119950?time=1376463600 -> http://backpack.tf/id/76561198078119950?time=1376550000

Histories don't match up somehow, the only thing I can figure is that things were bought and sold quickly on both sides, so the history got skipped or not recorded. He literally has nothing else of value he could have traded for the tree + keys.

http://www.tf2outpost.com/trade/12790192

Not sure what it sold for, possibly Secret Moon Salty Dog(~7.8)?

http://www.tf2outpost.com/trade/13169656

Sold for Time Warp War Pig(~10.3, slightly outdated) - outlier

http://www.tf2outpost.com/trade/12865282

Involved in a large trade for a Harvest Executioner with many unpriced hats

These are all the recent sales involving this hat.