Proof below. Overpay calculated. Original prices used

Sales

http://www.tf2outpost.com/trade/21724125

http://backpack.tf/profiles/76561198058635839?time=1407049200 ---> http://backpack.tf/profiles/76561198058635839?time=1407135600

Added 9 keys + Bills for a Stormy Cosa (?) = 1.3 buds

http://backpack.tf/profiles/76561198058635839?time=1407740400 ---> http://backpack.tf/profiles/76561198058635839?time=1407826800

29 keys = 1.5 buds

http://backpack.tf/profiles/76561198005848630?time=1411196400 ---> http://backpack.tf/profiles/76561198005848630?time=1412146800

Phos. Bolted Bicorne = 2.1 buds (Probably outdated by now) (outlier)

http://backpack.tf/profiles/76561198046948803?time=1409554800 ---> http://backpack.tf/profiles/76561198046948803?time=1409641200

DBD Gym Rat = 0.9 buds (outlier)

http://www.tf2outpost.com/trade/22005231 - Stormy Jeep + NnB Grimm + 3 keys = 1.9 buds

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