Sleep tight, sweet King.

https://backpack.tf/item/5207290487

Sale 1) Sold for 21 Keys

https://backpack.tf/profiles/76561198303302598#!/compare/1526688000/1526774400

Low outlier.

Sale 2) Sold for a Haunted Ghosts Sky High Fly Guy + 3 Keys

https://backpack.tf/profiles/76561198015384426#!/compare/1526947200/1527033600

This would better be used to price the Fly Guy.

Sale 3) Sold for a Purple Energy Sky High Fly Guy

https://backpack.tf/profiles/76561198303813920#!/compare/1527033600/1527206400

This would better be used to price the Fly Guy.

Sale 4) Sold for a Smoking Dr's Dapper Topper (22 Keys) + 9.5 Keys

https://backpack.tf/profiles/76561198044113544#!/compare/1527206400/1527292800

https://backpack.tf/profiles/76561198049256128#!/compare/1527206400/1527292800

https://imgur.com/a/KUJLo0U - Thanks Pootis Bird

22 + 9.5 = 31.5, which rounds to 32 Keys

https://backpack.tf/item/5193135708

Sale 5) Sold for 27 Keys

https://backpack.tf/profiles/76561198067575136#!/compare/1520553600/1520726400

Sale 6) Sold for a Duped Circling Heart Lord Cockswain’s Pith Helmet + Smoking Prancer’s Pride

https://backpack.tf/profiles/76561198280357510#!/compare/1524787200/1524873600

http://www.tf2outpost.com/trade/29634402 - Capped by the Buyout of 27 Keys

Sale 7) Sold for an Orbiting Planets Scout Shako + Bubbling Rimmed Raincatcher + 1 Key

https://backpack.tf/profiles/76561197977418982#!/compare/1524528000/1524873600

Low outlier.

Shako Mini

https://imgur.com/a/qusOxc0 - 1 Month Unsold at 13 Keys. No sales that I could find.

Sale 8) Sold + 6 Keys for a Burning Flames Janissary Ketche (33 Keys)

https://backpack.tf/profiles/76561198182795337#!/compare/1524960000/1525046400

https://backpack.tf/profiles/76561198263801172#!/compare/1524960000/1525046400

33 - 6 = 27 Keys

Ketche Mini

https://backpack.tf/suggestion/5b1066e5cf6c752852146697 - 27 Keys

Sale 9) Sold + 5 Keys for a Smoking Bonk Boy + Purple Energy Magnificent Mongolian

https://backpack.tf/profiles/76561198263801172#!/compare/1525478400/1525564800

https://backpack.tf/profiles/76561198410145031#!/compare/1525478400/1525564800

http://www.tf2outpost.com/trade/29639447 - Capped by the Buyout of 26 Keys

Sale 10) Sold + 8 Keys for a Purple Confetti Patriot Peak (44 Keys)

https://backpack.tf/profiles/76561198410145031#!/compare/1525996800/1526083200

http://www.tf2outpost.com/trade/29643484 - Capped by the Buyout of 35 Keys

High outlier.

Peak Mini

https://backpack.tf/suggestion/5b10d26a44325a6b251d9ab3 - 44 Keys

Sale 11) Quicksold for 24 Keys

https://backpack.tf/profiles/76561198056086416#!/compare/1525996800/1526083200

Sale 12) Quicksold for 25 Keys

https://backpack.tf/profiles/76561198093495779#!/compare/1525996800/1526083200

Sale 13) Sold for a Terror-Watt Surgeon’s Stahlhelm (26.5 Keys) + 2 Keys + ~1 Key of Items

https://backpack.tf/profiles/76561198388363768#!/compare/1525996800/1526083200

26.5 + 2 + 1 = 29.5, which rounds to 30 Keys

Stahl Mini

Doctor's aren't terrifying.

https://backpack.tf/item/6132660374

Sale 1) Sold for $59.99 when Keys were ~$1.98

https://marketplace.tf/items/616;5;u57

59.99 / 1.98 = 30.3, which rounds to 30 Keys

https://backpack.tf/item/5055545085

Sale 2) Sold + ~1.5 Keys of Items for a Disco Beat Down Runner's Warm-Up (30 Keys)

https://backpack.tf/profiles/76561198192118853#!/compare/1525996800/1526083200

http://www.tf2outpost.com/trade/29640300 - Capped by the Buyout of 26 Keys

Sale 3) Sold + ~2 Keys of Items for a Dead Presidents Cotton Head (22.5 Keys) + '72 Most Wanted (5.25 Keys)

https://backpack.tf/profiles/76561198355667850#!/compare/1526256000/1526342400

22.5 + 5.25 - 2 = 25.75, which rounds to 26 Keys

Sale 4) Sold for an Orbiting Fire Salty Dog (27 Keys)

https://backpack.tf/profiles/76561198055622215#!/compare/1526774400/1526860800

Salty Macro

https://backpack.tf/profiles/76561198283271543#!/compare/1526688000/1526774400 - Sold for 24 Keys + <0.5 Keys of Items

https://backpack.tf/profiles/76561198080179568#!/compare/1525478400/1525564800 - Sold for 28 Keys + 46 Refined (~30 Keys)

Sale 5) Sold for 21 Keys

https://backpack.tf/profiles/76561198146579306#!/compare/1526947200/1527033600

Low outlier.

Sale 6) Sold for a Strange Miami Nights Airdog + 3 Keys

https://backpack.tf/profiles/76561198015384426#!/compare/1527033600/1527120000

http://www.tf2outpost.com/trade/29663047 - Capped by the Buyout of 23 Keys

Airdog Macrpo

https://backpack.tf/profiles/76561198066730552#!/compare/1527292800/1527379200 - Quicksold for 17 Keys

https://backpack.tf/profiles/76561198092295228#!/compare/1527379200/1527465600 - Sold for a Searing Plasma Head Hedge (21.5 Keys) + 3 Keys

https://backpack.tf/profiles/76561198140565712#!/compare/1527465600/1527552000 - Sold for a Smoking Whirly Warrior + 2 Keys

https://backpack.tf/profiles/76561198119624795#!/compare/1527465600/1527552000 - Buyer's side for the above sale

http://www.tf2outpost.com/trade/29667350 - The Buyout was 23 Keys

https://backpack.tf/profiles/76561198119624795#!/compare/1527465600/1527552000 - Sold for a Starstorm Insomnia Nickel

Sale 7) Sold + 6 Keys + ~0.6 Keys of Items for a Haunted Phantasm Jr Plug-In Prospector

https://backpack.tf/profiles/76561198181530127#!/compare/1527379200/1527465600

http://www.tf2outpost.com/trade/29663408 - Buyout was 29 Keys, so this sale fits in the range. This sale could also be used for the Prospector.

Sale 14) Sold for a Haunted Ghosts Tundra Top

https://backpack.tf/profiles/76561198340736289#!/compare/1526083200/1526169600

This should be used to price the Tundra.