1 of 4, none on the market.

Sold for a Green Black Hole Firewall Helmet(4.3 Buds with Overpay. Outlier)

http://backpack.tf/profiles/76561198045659793?time=1398668400 -> http://backpack.tf/profiles/76561198045659793?time=1399172577

Sold for a Circling TF Logo Football Helmet(1 Bud with Overpay), a Bubbling Cold Killer(1.6 Buds with Overpay), a Stormy Storm Buckaroo's Hat(13.5 Keys with Overpay) and 0.85 Keys in Sweets(3.5 Buds total)

http://i.imgur.com/e8qgPrH.png

Sold for a Hellfire Gym Rat(2.9 Buds with Overpay) + 1.55 Keys in Items(3 Buds total)

http://i.imgur.com/Q3mnY8E.png

Credit to WizardFort for the pictures.

3-4.3 is a very long range, that's why 4.3 is an outlier. 3-3.5 seems fine for this.

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