Proof below. Overpay calculated. Original prices used

Sales

http://backpack.tf/id/76561198071144263?time=1385971200 ---> http://backpack.tf/id/76561198071144263?time=1386057600

Clean Max, other guy added Black Bills & 2 keys = 1.8 buds

http://www.tf2outpost.com/trade/15531604

Misty Elfin, other guy added a Roboactive Mongolian = 1.3 buds (outlier?)

http://www.tf2outpost.com/trade/15247720 ---> http://www.tf2outpost.com/trade/15248388

Stormy Fed + ~1 key in items = 2 buds

Side note: I own that Fed atm! xD

http://www.tf2outpost.com/item/440,2008824982 ---> http://www.tf2outpost.com/item/440,2014660507

Blizz Full Metal Drill = 1.6 buds

http://www.tf2outpost.com/trade/14776453

PE Footy Helm + S. Huntsman = 2.2 buds

Conclusion

Got some sales, vote accordingly :3

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