Forgot to calculate overpaying :P

Thx aaroncsn for additional sales!

Sale 1

http://www.tf2outpost.com/trade/22413105 - Sold with a Phosphorous Broadband Bonnet (2 buds) for a Disco Beat Down Deep Cover Operator (7.8 buds) (7.8*0.9 - 2 = 5 buds) (Outlier)

Sale 2

http://www.tf2outpost.com/trade/22285795 - Sold for Searing Plasma Honcho's headgear (3.7*0.9 = 3.3 buds)

Sale 3

http://www.tf2outpost.com/trade/22529071 - Sold for Strange Specialized killstreak kritzkrieg (38 keys) + Strange Specialized Killstreak Festive Crusader's Crossbow (3 keys) + Strange Specialized Killstreak Festive Ubersaw (6 keys) + ~6 keys in sweets = around 3 buds. (3*0.9 = 2.7 buds)

Feel free to counter / support my proofs.