This is a resuggestion of this suggestion.

https://backpack.tf/suggestion/5cb3f7f46780723b136ff82a

https://backpack.tf/profiles/76561198102298516#!/compare/1555200000/1555286400

https://backpack.tf/profiles/76561197960958019#!/compare/1555027200/1555286400

Bulk for Scorching Scot Bonnet

https://marketplace.tf/items/30393;5;u14

Sold on April 11, 2019 for $200.00 / 1.77 = 113 keys

https://backpack.tf/profiles/76561198859721638#!/compare/1555718400/1555804800

https://backpack.tf/profiles/76561198089298088#!/compare/1555718400/1555804800

Either 84 or 87 keys from scrap.tf, I can't really tell

https://backpack.tf/profiles/76561198069694473#!/compare/1556496000/1556582400

https://backpack.tf/profiles/76561198064115286#!/compare/1555977600/1556496000

Tesla Coil Vive La France + Burning Soldier's Scopers - This sale is over 160 keys. I couldn't find a buyout on bot.tf if there was one.

https://backpack.tf/profiles/76561198089298088#!/compare/1556064000/1556496000

https://backpack.tf/profiles/76561198172248317#!/compare/1556496000/1556668800

Power Surge Bunsen Brave, Searing Honcho's Headgear, Purple Energy Tavish Degroot Sexperience (Duped), Screaming Tiger Scotsmann's Stagger, 4 keys

https://backpack.tf/profiles/76561198089298088#!/compare/1556668800/1556755200 PE Tavish sold for three outdated unusuals

-- GFetti fro later sold for 12 keys https://backpack.tf/profiles/76561198089298088#!/compare/1556755200/1556841600

-- https://marketplace.tf/items/95;5;u6 https://gyazo.com/19b3a5f6e5662f70f6671c2fa2f41ec0 Engineer's Cap about 12 keys

--Cloud Crasher https://backpack.tf/profiles/76561198089298088#!/compare/1557273600/1557360000 ehhh pretty much around 24 keys

Bunsen Brave is in-date at 21.5 keys https://backpack.tf/suggestion/5ca559afd381725da91a4d22

Searing Honcho is being updated to 23 keys https://backpack.tf/suggestion/5cdbc9ac6780720e7914ef88

Stagger has sales at $23, $22, and $21.99 = 13, 12, 12 keys - Going with 12 keys as a mini https://marketplace.tf/items/30840;5;u3006

This sale is about 110 keys.

Sales:

~84/87, 110, 113, 160

Ruling 84/87 and 160 as outliers.