Took me ages to do since my Chrome froze and I lost all da links >.< (When I finished finding all of them D:)

Proof below. Overpay calculated. Original prices used

Sales

http://www.tf2outpost.com/trade/18755194

http://backpack.tf/profiles/76561198043377199?time=1396249200 ---> http://backpack.tf/profiles/76561198043377199?time=1396335600

Added a bud for a Steaming Bonk Boy + 2 keys = 1.3 buds (No overpay since offered on)

http://www.tf2outpost.com/trade/19269184

http://backpack.tf/profiles/76561198078585279?time=1397804400 ---> http://backpack.tf/profiles/76561198078585279?time=1397890800

Added ~4 keys for a Steaming Bubble Pipe = 1.5 buds (No overpay since offered on)

http://www.tf2outpost.com/trade/18495782 - Added a black BMOC for an Orb Fire Noble = 1.1 buds (No overpay since offered on)

http://www.tf2outpost.com/trade/18464369 - Added a Blizz Guad + ~3 keys for a SF Rocket = 17 keys (outlier)

http://www.tf2outpost.com/trade/18529142

http://backpack.tf/profiles/76561197988076912?time=1394953200 ---> http://backpack.tf/profiles/76561197988076912?time=1395039600

Smoking Salty + ~6.5 keys in sweets = 1.3 buds

http://backpack.tf/profiles/76561198095293440?time=1394953200 ---> http://backpack.tf/profiles/76561198095293440?time=1395039600

Side note: Open suggestion for Salty: http://backpack.tf/vote/id/5359e68a4cd7b84c0a8b4569

http://www.tf2outpost.com/trade/18548904 + http://www.tf2outpost.com/trade/18549356

Smoking Noir + Spec KS. SF Frontier = 1.2 buds (No overpay since offered on + using selling price as an estimate for Frontier)

http://www.tf2outpost.com/item/440,2270426526,445,5 ---> http://www.tf2outpost.com/item/440,2393605263,600,5

Planets YWN = 1 bud

Both quicksold for a bud as well, but still support the range:

http://www.tf2outpost.com/trade/18483964

http://www.tf2outpost.com/trade/19085390

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