Really needs a drop.

Sold for a Stormy Storm Milkman(15.5 Keys, rounding to 16)

http://backpack.tf/profiles/76561198248865532#!/compare/1467331200/1467417600

Sold for an Australium Spec KS Tomislav(~14 Keys at the time) and ~3 Keys in Sweets(17 Keys total)

http://backpack.tf/profiles/76561198161523896#!/compare/1465776000/1465948800

Sold for an Australium Spec KS Stickybomb Launcher(~15.5 Keys) and Mannrobics(1.5 Keys)(17 Keys total)

http://backpack.tf/profiles/76561198212668879#!/compare/1466726400/1466812800

Sales seem to fit, 16-17 Keys should be fine.

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