Credits to MaGenta and Dead Acc. for their respective proofs. I only gathered the proof for the Bone Dome and the minis.

Taking over for Dead Acc as requested by him.

Sold with a Strange Festive Spec KS Scattergun(~31 Keys with Overpay) for a Disco Beat Down Human Cannonball(4.5 with Overpay)(2.5 Total, outlier)

http://www.tf2outpost.com/item/440,3309438385,174,5 Whoopee History

http://www.tf2outpost.com/item/440,3267685681,817,5 Cannonball History

http://www.tf2outpost.com/item/440,3262461185,669,11 SF Scatter history

Added 3 Keys for a Searing Plasma Fed-Fightin' Fedora(3, Offered)(2.8 Total)

http://www.tf2outpost.com/item/440,3309438385,174,5 -> http://www.tf2outpost.com/item/440,3226503389,780,5

http://www.tf2outpost.com/trade/23874750

Sold for an Amaranthine Bone Dome(3.6 with Overpay)

http://www.tf2outpost.com/trade/23733213

Sold for an Anti-Freeze Flipped Trilby(6.7 with Overpay, B/O was 5, Outlier)

http://www.tf2outpost.com/trade/24224178

http://www.tf2outpost.com/trade/24222407

Sold for an Overclocked Aviator Assassin(3.2 with Overpay, invalid because Whoopee was used to priced it)

http://www.tf2outpost.com/trade/24224178

http://backpack.tf/profiles/76561198097798693?time=1419062400

Amaranthine Bone Dome mini suggestion

Sold for a Miami Nights Thirst Blood(3.4 with Overpay) + 9 Keys(4 Total)

http://backpack.tf/profiles/76561198066963919?time=1416159474 -> http://backpack.tf/profiles/76561198066963919?time=1416211200

Only useable sale I could find, going with 4.

Searing Plasma Fed-Fightin' Fedora mini suggestion

Added 3 Buds for a Sunbeams Hermes(6 Buds, offered)(3 Total)

http://backpack.tf/profiles/76561198046871460?time=1415347200

http://www.tf2outpost.com/trade/23405027

http://www.tf2outpost.com/trade/24324677 Young 2.8 Bud seller(Argueable because of recent bud spikes)

http://www.tf2outpost.com/trade/24245970 3.5 Bud seller

http://www.tf2outpost.com/trade/24189768 3.5 Bud seller

http://www.tf2outpost.com/trade/23610058 3.5 Bud seller, unsold for a month

Going with 3.

Anti-Freeze Flipped Trilby mini suggestion

Sold for a Burning Flames Hermes(7.4 with Overpay)

http://backpack.tf/profiles/76561198097798693?time=1418889600 -> http://backpack.tf/profiles/76561198097798693?time=1418996445

Using 7.4.

5's an Outlier because of lower sales and lower B/Os. Made 2.5 an outlier because if we took the time of the sale into account, it would probably be worth even less.

Sales at 2.8 and 3.6, and ironically the Aviator sale meets them at the midpoint. 2.8-3.6 should be fine.

Additional Proof/Counter-Proof/Constructive Criticism/Feedback is always appreciated.