Sold for a Knifestorm Brain Bucket(2.4 with Overpay, duped but suggestion was based off it)

http://backpack.tf/profiles/76561198042278010?time=1407567600 -> http://backpack.tf/profiles/76561198042278010?time=1407775060

Sold for a Terror-Watt Surgeon's Stahlhelm(2.9 with Overpay)

http://www.tf2outpost.com/item/440,2748709768,1109,5 Results History

http://www.tf2outpost.com/item/440,2748966918,616,5 Stahlhelm History

Sold for an Australium Sniper Rifle(2.5 with Overpay) and a Strange Spec KS Huntsman(~6 Keys?)(2.8 Total)

http://backpack.tf/profiles/76561198137120386?time=1404716400 -> http://backpack.tf/profiles/76561198137120386?time=1404821951

Sold for 1 Bud + Strange All-Father(1.3, Outlier)

http://backpack.tf/profiles/76561198096734996?time=1404630000 -> http://backpack.tf/profiles/76561198096734996?time=1404716400

http://www.tf2outpost.com/trade/21049222

With three sales at a good enough range, I think 2.4-2.9 should be fine.

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