Ech.

Sold for an Aces High El Jefe(26.5 Keys, rounding to 27)

http://backpack.tf/profiles/76561198071929218/#!/compare/1455955200/1456387200

Sold with a Bill's Hat(2 Keys) for a Stormy Storm Modest Pile of Hat(31.5 Keys, rounding to 32)(30 Keys total)

http://backpack.tf/profiles/76561198158662054/#!/compare/1458111600/1458198000

Sold with ~4.5 Keys in Sweets for an Australium Scattergun(39.5 Keys at the time)(35 Keys total)

http://backpack.tf/profiles/76561198238890794/#!/compare/1458370800/1458457200

Sales seem to fit, 27-35 Keys should be fine.

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