Sold for [The Big Kill (.69) + 15 keys (1.15)]:

http://backpack.tf/profiles/76561198061573538?time=1420790400

http://i.gyazo.com/ad43f5089c47272a8c5e4842cfc09267.png

I counted 15 keys. Big Kill was sold on market after the buyer got it?

.69 * .9 + 1.15 = 1.771 buds

Rounded to 1.8 buds

[Sold with Cloud 9 Frenchman's Beret (2.2) + ~3 keys in sweets (.2)] for Stormy Storm Tough Stuff Muffs (4.15):

http://backpack.tf/profiles/76561198057468175?time=1421626499

http://backpack.tf/profiles/76561198057468175?time=1421654400

Owner offered.

4.15 - .2 - 2.2 = 1.75 buds

Rounded to 1.8 buds

Sold for 26 keys pure:

http://www.tf2outpost.com/trade/24541275

http://backpack.tf/profiles/76561198061717043?time=1420876800

http://backpack.tf/profiles/76561198061717043?time=1420994425

~1.7 buds

Sold for Searing Plasma Professional's Panama (2):

http://www.tf2outpost.com/trade/24355576

http://backpack.tf/profiles/76561198010980521?time=1419880135

http://backpack.tf/profiles/76561198010980521?time=1420012800

Buyout of 1.7 buds