Kazotsky Python

https://backpack.tf/item/6885397656

Sale 1) Sold for 22 Keys

https://backpack.tf/profiles/76561198169256598#!/compare/1531785600/1531958400

https://backpack.tf/item/6816628815

Sale 2) Sold for 24 Keys

https://backpack.tf/profiles/76561198021697319#!/compare/1532217600/1532304000

https://backpack.tf/item/6538257119

Sale 3) Sold for 26 Keys

https://backpack.tf/profiles/76561197995029705#!/compare/1529280000/1529366400

Sale 4) Sold for 26 Keys + 1 Refined

https://backpack.tf/profiles/76561198102964652#!/compare/1529798400/1529971200

Rounds to 26 Keys

https://backpack.tf/item/6372841964

Sale 5) ?

https://backpack.tf/profiles/76561198059136265#!/compare/1532908800/1533081600

https://backpack.tf/profiles/76561198103341552#!/compare/1532563200/1533081600

https://backpack.tf/item/5734805718

Sale 6) Became Unusual

https://backpack.tf/profiles/76561198205984367#!/compare/1532649600/1532736000

https://backpack.tf/profiles/76561198272336662#!/compare/1533168000/1533340800

https://backpack.tf/item/4443132859

Sale 7) ?

https://backpack.tf/profiles/76561198167182836#!/compare/1531699200/1532563200

Sale 8) Sold for 22 Keys

https://backpack.tf/profiles/76561198311498888#!/compare/1532217600/1532304000

https://backpack.tf/item/4248433375

Sale 9) Sold + Green Confetti Classy Capper for a Death at Dusk Brigade Helm + Holy Grail Spent Well Spirits

https://backpack.tf/profiles/76561198158748076#!/compare/1532822400/1532995200

High outlier.

Sale 10) Sold for a Festivized Specialized Killstreak Australium Scattergun (~24 Keys)

https://backpack.tf/profiles/76561198047941585#!/compare/1533081600/1533168000

https://backpack.tf/profiles/76561198049901581#!/compare/1533081600/1533168000

Sale 11) Sold for a Showstopper Party Trick + ~1 Key of Items

https://backpack.tf/profiles/76561198049901581#!/compare/1533168000/1533254400

Low outlier.

Sale 12) Sold for 11 Keys + Holy Grail Bucking Bronco (10.5 Keys)

https://backpack.tf/profiles/76561198187962094#!/compare/1533254400/1533340800

11 + 10.5 = 21.5, which rounds to 22 Keys

Bronco Mini

https://backpack.tf/suggestion/5b65c1d944325a51b3774ae2 - 10.5 Keys

https://backpack.tf/item/3957145195

Sale 13) Sold for 26 Keys

https://backpack.tf/profiles/76561198086948995#!/compare/1532736000/1532908800

https://backpack.tf/item/3939048044

Sale 14) ?

https://backpack.tf/profiles/76561198014187366#!/compare/1528675200/1529020800

https://backpack.tf/profiles/76561197968633696#!/compare/1528934400/1529020800

Sale 15) Sold for 26 Keys + 5.33 Refined

https://backpack.tf/profiles/76561197968633696#!/compare/1529020800/1529107200

Rounds to 26 Keys

https://backpack.tf/item/3904353783

Sale 16) ?

https://backpack.tf/profiles/76561198089255645#!/compare/1530489600/1532563200

Sale 17) ?

https://backpack.tf/profiles/76561198312583107#!/compare/1531440000/1531526400

https://backpack.tf/profiles/76561198030042913#!/compare/1527724800/1531612800

https://backpack.tf/item/3916770110

Sale 18) Sold for 16 Keys

https://backpack.tf/profiles/76561198102806068#!/compare/1532649600/1532736000

https://backpack.tf/profiles/76561198335791307#!/compare/1532563200/1532649600

https://imgur.com/a/A9tow47

Low outlier.

https://marketplace.tf/items/1157;5;u3003 - Sales between $49.98 and $50.50 (all ~26 Keys) and a sale at $40 when Keys were ~$1.94 each

40 / 1.94 = 20.6, which rounds to 21 Keys