If I suddenly see this thing being used on sweetstakes I won't be surprised.

Sold for 20 Keys

http://backpack.tf/profiles/76561198002757046/#!/compare/1458111600/1458198000

Sold for a Terror-Watt Tavish Degroot Experience(19.5 Keys, rounding to 20)

http://backpack.tf/profiles/76561198045446139/#!/compare/1457251200/1457683200

Sold with ~1 Key in Sweets for a Massed Flies Valley Forge(28 Keys)(27 Keys total, Outlier)

http://backpack.tf/profiles/76561198014005199/#!/compare/1457596800/1457683200

27 seems high with the sellers at less, 20 Keys should be fine.

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