Geez

https://backpack.tf/item/2372334185

Sale 1) Sold for 26 Keys + 17.33 Refined

https://backpack.tf/profiles/76561198044586012#!/compare/1560988800/1561075200

Low outlier.

Sale 2) Sold for 32 Keys

https://backpack.tf/profiles/76561198080179568#!/compare/1561939200/1562025600

https://backpack.tf/profiles/76561198036270946#!/compare/1561852800/1562025600

https://imgur.com/a/wTrBLo7

Sale 3) Sold for a Frostbite Ol' Geezer

https://backpack.tf/profiles/76561198036270946#!/compare/1562112000/1562198400

The Frostbite Ol' Geezer has no Mini, so this can be used to raise its price.

Sale 4) ?

https://backpack.tf/profiles/76561198205939253#!/compare/1562112000/1562198400

Sale 5) Sold for 32 Keys

https://backpack.tf/profiles/76561198080179568#!/compare/1563321600/1563408000

Sale 6) Bulk sale for a Burning Flames Doctor's Dapper Topper

https://backpack.tf/profiles/76561198036178814#!/compare/1565395200/1565481600

Sale 7) Sold for $59.99 when Keys were ~$1.83 each

https://marketplace.tf/items/tf2/399;5;u10

https://marketplace.tf/items/tf2/5021;6

59.99 / 1.83 = 32.78, which rounds to 33 Keys

https://backpack.tf/item/5350247770

Sale 8) Sold for $60 when Keys were ~$1.80 each

https://marketplace.tf/items/tf2/399;5;u10

https://marketplace.tf/items/tf2/5021;6

60 / 1.8 = 33.33, which rounds to 33 Keys