The Asian Persuasion

https://backpack.tf/item/3598656950

Sale 1) Sold for a Starstorm Slumber Vive la France + Miami Nights Firewall Helmet

https://backpack.tf/profiles/76561198108003244#!/compare/1520726400/1520899200

Fits in the range.

Sale 2) Sold for $96.53 when Keys were ~$1.97 each

https://marketplace.tf/items/30177;5;u57

96.53 / 1.97 = 49 Keys

Sale 3) ?

https://backpack.tf/profiles/76561198068362716#!/compare/1526083200/1526169600

https://backpack.tf/profiles/76561198251433444#!/compare/1526169600/1526256000

https://backpack.tf/item/2701168698

Sale 4) ?

https://backpack.tf/profiles/76561198197517377#!/compare/1523404800/1525219200

Sale 5) Bulk sale

https://backpack.tf/profiles/76561198083029837#!/compare/1526083200/1526169600

Sale 6) ?

https://backpack.tf/profiles/76561198178088350#!/compare/1526169600/1526256000

Sale 7) Sold for a Haunted Ghosts Spook Specs + Circling Heart Bomb Beanie

https://backpack.tf/profiles/76561198056793444#!/compare/1527033600/1527120000

High outlier.

https://backpack.tf/item/5019660260

Sale 8) Sold for a Blizzardy Storm Killer Exclusive (62 Keys)

https://backpack.tf/profiles/76561198297554259#!/compare/1520380800/1520467200

Sale 9) Sold for a Kill-a-Watt Federal Casemaker

https://backpack.tf/profiles/76561198439456863#!/compare/1520640000/1520726400

Low outlier.

Sale 10) Sold for a Voltaic Hat Protector Phononaut + Starstorm Slumber Cranial Carcharodon + Terror-Watt Conquistador

https://backpack.tf/profiles/76561198282372085#!/compare/1522540800/1522627200

Fits in the range.

Phononaut Mini

https://imgur.com/a/dGfr5A4 - Using the 26 Key Seller

https://backpack.tf/item/4251699825

https://backpack.tf/item/4596053090

https://backpack.tf/item/4236626115

Cranial Mini

https://marketplace.tf/items/30800;5;u110 - Sales at $37.99, $38.99, and $39.99 (19 - 20 Keys)

Conquistador Mini

https://imgur.com/a/UpbFx99 - The 1 Month Unsold at 14 Keys suggests the Conquistador is worth less than 14

https://backpack.tf/item/2213740947

https://backpack.tf/item/3382327620

https://backpack.tf/item/3215995981

Sale 11) Sold for 48 Keys + ~3 Keys of Items

https://backpack.tf/profiles/76561198106017833#!/compare/1524268800/1524873600

48 + 3 = 51 Keys

Sale 12) Sold + ~8.5 Keys of Items for a Duped Cloudy Moon Bone Dome (68.5 Keys) + ~1.5 Keys of Items

https://backpack.tf/profiles/76561198288202783#!/compare/1526342400/1526428800

68.5 + 1.5 - 8.5 = 61.5, which rounds to 62 Keys

Bone Dome Mini

Sold for a Neutron Star Lil' Bitey (38 Keys) + Vivid Plasma Nanobalaclava (20 Keys) + ~13 Keys of Items + 1 Key

https://backpack.tf/profiles/76561198192602363#!/compare/1525996800/1526083200

http://www.tf2outpost.com/trade/29661841 - Seller for 65 Keys

Lil' Bitey Macro

https://marketplace.tf/items/30814;5;u107 - Usable Sales ($59 to $89.99) range from 30 to 46 Keys.

Nanobalaclava Macro

https://imgur.com/a/Oi1OTgP - Sellers at 20 and 22 Keys.

Sale 13) Sold + 10 Keys for a Circling Heart Caribou Companion (56 Keys)

https://backpack.tf/profiles/76561198288202783#!/compare/1526688000/1526774400

56 - 10 = 46 Keys

Sale 14) Sold + Pro KS Blood Botkiller Rocket (~12 Keys) for a Pro KS Aussie Rocket (~49 Keys) + Terror-Watt Drill Hat + Starduster (~2 Keys)

https://backpack.tf/profiles/76561197994697258#!/compare/1527552000/1527638400

http://www.tf2outpost.com/trade/29661010 - Capped by the Buyout of 53 Keys

https://backpack.tf/item/5031581171

Sale 15) Sold for 47 Keys

https://backpack.tf/profiles/76561198139171368#!/compare/1520208000/1520294400

Sale 16) Sold for 48 Keys

https://backpack.tf/profiles/76561198114740397#!/compare/1525737600/1526083200

Sale 17) Sold for 45 Keys

https://backpack.tf/profiles/76561198387261836#!/compare/1526860800/1526947200

Sale 18) Sold for a Death at Dusk Otolaryngologist's Mirror (33 Keys) + 6 Keys

https://backpack.tf/profiles/76561198108608612#!/compare/1527120000/1527206400

33 + 6 = 39 Keys

Sale 19) Sold + 1 Key for an Orbiting Planets Brotherhood of Arms + Kill-a-Watt Liquidator's Lid

https://backpack.tf/profiles/76561198108608612#!/compare/1527206400/1527379200

https://backpack.tf/profiles/76561198292075879#!/compare/1527292800/1528070400

http://www.tf2outpost.com/trade/29664287 - Capped by the Buyout of 50 Keys

The Steaming Hong Kong Cone + Australium Scattergun + Pistol were sold for the Brotherhood of Arms + Liquidator's Lid as seen here:

https://backpack.tf/profiles/76561198053717045#!/compare/1527292800/1527379200

https://backpack.tf/item/2328112218

Sale 20) ?

https://backpack.tf/profiles/76561198117252532#!/compare/1520467200/1521936000

Sale 21) Sold for 40 Keys + 19 Refined

https://backpack.tf/profiles/76561198124371925#!/compare/1522108800/1522627200

https://cdn.discordapp.com/attachments/298073323219320834/453403642544914449/unknown.png

Rounds to 41 Keys

Sale 22) Sold for 46 Keys + 18 Refined

https://backpack.tf/profiles/76561198344933095#!/compare/1523491200/1523577600

https://cdn.discordapp.com/attachments/298073323219320834/453403642544914449/unknown.png

Rounds to 47 Keys

Sale 23) Sold for 50 Keys

https://backpack.tf/profiles/76561198247572926#!/compare/1525046400/1525651200

Sale 24) Sold for a Disco Beat Down Tundra Top

https://backpack.tf/profiles/76561198823992731#!/compare/1527638400/1527724800

This should be used to price the Tundra.

Since 41 sold to a Bot, I'm calling 39, 40 (the Casemaker), and 41 low.