This suggestion is themed because planes crash periodically.

hue hue hue

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Sale #1 14th - 15th of May

http://backpack.tf/profiles/76561198089818827?time=1431653018 before

http://backpack.tf/profiles/76561198089818827?time=1431673200 after

Sold for: S.F.Sniper(~13) + S.Disc. Action(~1.5) + Painted in TS Essential Accesories(~1.5, screw it) + Taunt: Most wanted (~1) 13+1.5+1.5+1 = 17*0.9 = 15.3 -> 15

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Sale #2 Not used as a main proof. ||| 22nd - 23rd of May

http://backpack.tf/profiles/76561198122872975?time=1432278000 before

http://backpack.tf/profiles/76561198122872975?time=1432364400 after

1:1 with Overclocked Soviet Gentleman(unpriced), will be used to price soviet probably

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Sale #3 11th - 14th of May

http://backpack.tf/profiles/76561198089818827?time=1431327600 before

http://backpack.tf/profiles/76561198089818827?time=1431653018 after

Bought for Spec.KS Australium Force-a-nature (~14 via lazy mini) Taking 14.

Mini Took 4 last sales on scm, divided by shop price of keys, got ~13.9... Close enough.

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Additional sale Theoretically can be a support proof, dunno. 12th - 13th of May

http://backpack.tf/profiles/76561198045358108?time=1431418637 before

http://backpack.tf/profiles/76561198045358108?time=1431500400 after

Complex sale for Australium Rocket Launcher, not using

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Conclusion aka tl;dr: Got all recent valid sales, the only 2 else were from scammer's alt, not using them obv. Sales for 14 and 15, taking a range of 14 - 15.