Proof below. Overpay calculated. Original prices used

Sales

http://backpack.tf/profiles/76561198017605620?time=1396422000 ---> http://backpack.tf/profiles/76561198017605620?time=1396508400

Phos. Attendant + 1 bud + 9 keys = 6.6 buds (Outdated)

http://www.tf2outpost.com/trade/19540246 ---> http://www.tf2outpost.com/item/440,2570354557,627,5

PE Flamenco = 6 buds (Outlier)

http://backpack.tf/profiles/76561198087011715?time=1403161200 ---> http://backpack.tf/profiles/76561198087011715?time=1403247600

Added P. Fetti Berliners + Planets Mongo for a PE Cold Killer = 7.8 buds

http://www.tf2outpost.com/trade/20498404

http://backpack.tf/profiles/76561198087011715?time=1403506800 ---> http://backpack.tf/profiles/76561198087011715?time=1403593200

13th Hour Brigade + 25 keys = 8.4 buds

http://backpack.tf/profiles/76561198042240880?time=1403593200 ---> http://backpack.tf/profiles/76561198042240880?time=1403938800

Help / Constructive Criticism / Additional Proof / Counter-Proof is ALWAYS welcome! >;3