Needs an update, current price is way off. My first #DeathtoMiami suggestion XD

Only recent sale I could find.

http://www.tf2outpost.com/trade/19500781

http://backpack.tf/profiles/76561198119556478?time=1398927600 ---> http://backpack.tf/profiles/76561198119556478?time=1399014000

Added 3 buds for a Stormy TC and 10 keys (6.3, plus the 10 keys is 6.8)

6.8 - 3 = 3.8 * 0.9 = 3.4 buds

Unsolds below current price:

http://www.tf2outpost.com/trade/19203599 3 buds, unsold 2 weeks.

http://www.tf2outpost.com/trade/18705465 4 buds, unsold 1 month.

So that's a 3 seller (unsold) for the low end and a 3.4 sale for the high end. Let me know if you have additional proof, if there's anything I should add/change etc.