Hmm...

https://backpack.tf/item/949663208

Sale 1) Sold for 127 Keys

https://backpack.tf/profiles/76561198074924284#!/compare/1523059200/1523145600

Low outlier.

Sale 2) Sold for a Vivid Plasma Beak + Sunbeams Prussian + Duped Heart Ten Gallon + Bubbling Little Buddy + FoD Bronco + 6 Keys

https://backpack.tf/profiles/76561198014564575#!/compare/1523318400/1523491200

http://www.tf2outpost.com/trade/29613483 - Capped by the Buyout of 161 Keys, which I'll round to 160 Keys

https://backpack.tf/item/360071340 - Duped

Sale 3) Sold + Sunbeams Antarctic Eyewear (105 Keys) for a Haunted Ghosts Crone's Dome (255 Keys) + 21 Keys

https://backpack.tf/profiles/76561198050933686#!/compare/1529193600/1529280000

255 + 21 = 276 - 105 = 171, which I'll round to 170 Keys

Sale 4) Sold for a Stormy Storm Lightning Lid

https://backpack.tf/profiles/76561198052698297#!/compare/1529366400/1529452800

There's no Mini for the Lid.

Sale 5) Sold for a Scorching Flames Soldered (202.5 Keys) + 13 Keys

https://backpack.tf/profiles/76561198030462768#!/compare/1523145600/1523664000

202.5 + 13 = 215.5, which rounds to 215 Keys

Soldered Mini

https://backpack.tf/suggestion/5b35cad144325a30ce40d271 - 202.5 Keys