Elf Sweat

https://backpack.tf/item/5398680482

Sale 1) Sold for a Blizzardy Storm Lucky Shot (18.5 Keys)

https://backpack.tf/profiles/76561198095205978#!/compare/1511222400/1511481600

http://www.tf2outpost.com/trade/29439883 - Capped by the Buyout of 18 Keys

Sale 2) Sold + 3 Keys for a Steaming Defiant Spartan (12.5 Keys) + Smoking Voodoo Juju + ~0.5 Keys of Refined

https://backpack.tf/profiles/76561198066553175#!/compare/1511222400/1511395200

http://www.tf2outpost.com/trade/29453356 - Capped by the Buyout of 18 Keys

https://backpack.tf/item/2466362573

Sale 3) Sold for a Stormy Storm Voodoo Juju (17 Keys) + <0.5 Keys of Items

https://backpack.tf/profiles/76561198192602363#!/compare/1509580800/1509667200

Rounds to 17 Keys

Sale 4) Sold for an Orbiting Fire Detective Noir

https://backpack.tf/profiles/76561198255640609#!/compare/1511481600/1511654400

http://www.tf2outpost.com/trade/29423907 - Capped by the Buyout of 14 Keys

Low Outlier.