Updating a 6 month old price, there are 2 on outpost currently. Overpay is calculated in all instances.

http://www.tf2outpost.com/trade/14244115

Sold for a Bliz Crones(~8.5) + gifted Bliz Cranium(~1.5) + Cauldron Coppers(~1.3) + 1 bud = ~11.3 buds

http://www.tf2outpost.com/trade/14061038

Sold for Misty Skull Company Man(~9.6) + Bliz Softcap(~1.1) = ~10.7 buds

http://www.tf2outpost.com/trade/13897705

Sold for GBH Flamenco(not priced) + O. Fire Hallmark(~1.6) + Secret Diary(~25 keys)

http://www.tf2outpost.com/trade/12790995 - B/O 10 buds

Sold for Roboactive Honchos(~8.6) + 1 bud = ~9.6 buds - bit of an outlier, there were many sales at least a bud higher, and he "loved the hat"

http://www.tf2outpost.com/trade/14281403

Sold for Antifreeze Slug(no price) + Level 9 Max(~2.2)

http://www.tf2outpost.com/trade/14250460

Sold with PE Pith(~2.2) for Scorching Company Man(~15.3)

15.3 - 2.2 = ~13.1 buds

http://www.tf2outpost.com/trade/13631431

Sold for Beams Private Eye + 6 buds + 16 keys = ~10.5 buds