Still seems way too high

Circling TF Logo Das Naggenvatcher

Sold for a Green Energy Brain-Warming Wear(37 Keys)

https://backpack.tf/profiles/76561197999880447#!/compare/1498176000/1498262400

https://backpack.tf/item/5860484066

Sold for a Circling Heart Elf Esteem(23 Keys) and a Massed Flies Attendant(14 Keys)(37 Keys total)(B/O was 36)

https://backpack.tf/profiles/76561198068248647#!/compare/1498435200/1498521600

http://www.tf2outpost.com/trade/29243254

Sold for a Tesla Coil Physician's Protector(37 Keys) and 1 Key(38 Keys total)

https://backpack.tf/profiles/76561198091423180#!/compare/1498521600/1498608000

https://backpack.tf/item/5860484066

Sold with ~1 Key in Sweets for a Smoking Frickin' Sweet Ninja Hood(41 Keys)(40 Keys total)

https://backpack.tf/profiles/76561198271428524#!/compare/1498521600/1498608000

https://backpack.tf/profiles/76561198257905663#!/compare/1498521600/1498608000

Sold for a Cloud 9 Horrific Headsplitter(43 Keys, Outlier)

https://backpack.tf/profiles/76561198120500488#!/compare/1498780800/1498953600

https://backpack.tf/item/5860484066

36-40.