Sale 1:

https://backpack.tf/profiles/76561198061440669#!/compare/1562371200/1562457600

https://backpack.tf/profiles/76561198119147432#!/compare/1556323200/1562544000

sCM

Sale 2:

https://backpack.tf/profiles/76561198119147432#!/compare/1563062400/1563148800

https://backpack.tf/profiles/76561198006544512#!/compare/1562976000/1563062400

QS

Sale 3:

https://backpack.tf/profiles/76561198006544512#!/compare/1566432000/1566691200

https://backpack.tf/profiles/76561198087945631#!/compare/1566604800/1566691200

Sold for 14 keys

Sale 4:

https://backpack.tf/profiles/76561198080179568#!/compare/1564876800/1564963200

https://backpack.tf/profiles/76561198253519146#!/compare/1564876800/1564963200

Sold for 11 keys

Sale 5:

https://backpack.tf/profiles/76561198253519146#!/compare/1564876800/1564963200

https://backpack.tf/profiles/76561198074713124#!/compare/1564444800/1564963200

Sold for Of Topi + ~3.49 keys in sweets

use there

Sale 6:

https://backpack.tf/profiles/76561198074713124#!/compare/1566345600/1566691200

https://backpack.tf/profiles/76561198253519146#!/compare/1566604800/1566691200

Untrace

sale 7:

https://backpack.tf/profiles/76561198081247373#!/compare/1567036800/1567123200

https://backpack.tf/profiles/76561198131081286#!/compare/1567036800/1567123200

Sold with 2 keys for OF Fro

Sale 8:

https://backpack.tf/profiles/76561198131081286#!/compare/1567641600/1567728000

https://backpack.tf/profiles/76561198387100994#!/compare/1567296000/1567728000

Bulk

Sale 9:

https://backpack.tf/profiles/76561198387100994#!/compare/1567728000/1567814400

https://backpack.tf/profiles/76561198859721638#!/compare/1567728000/1567814400

Bulk

Sale 10:

https://backpack.tf/profiles/76561198838470364#!/compare/1561248000/1561420800

https://backpack.tf/profiles/76561198060410316#!/compare/1561075200/1561420800

Sold for ~11 keys

Sale 11:

https://backpack.tf/profiles/76561198060410316#!/compare/1561075200/1561420800

https://backpack.tf/profiles/76561198830630023#!/compare/1561334400/1561420800

Sold with negligible sweets for Stormy Broadband + 2 keys

Broadband Mini:

https://backpack.tf/suggestion/5d8212de678072232268b974

Suggestion for 9.25 keys

Total is ~11 keys

Sale 12:

https://backpack.tf/profiles/76561198830630023#!/compare/1561420800/1561507200

https://backpack.tf/profiles/76561198225451840#!/compare/1561420800/1561507200

Sold for 13 keys

sale 13:

https://backpack.tf/profiles/76561198337734785#!/compare/1564617600/1564704000

https://backpack.tf/profiles/76561198825943127#!/compare/1564617600/1564704000

Sold for 13 keys

Sale 14:

https://backpack.tf/profiles/76561198825943127#!/compare/1565740800/1565827200

https://backpack.tf/profiles/76561198328629740#!/compare/1565740800/1565827200

Sold for 9 keys

Sale 15:

https://backpack.tf/profiles/76561198328629740#!/compare/1565740800/1565827200

https://backpack.tf/profiles/76561198160331210#!/compare/1565740800/1565827200

can trace 2 keys

Sale 16:

https://backpack.tf/profiles/76561198160331210#!/compare/1565740800/1565827200

https://backpack.tf/profiles/76561198202476873#!/compare/1565740800/1565827200

Sold for Subatomic HFOHA + ~0.5 keys in sweets

HFOHA Mini:

https://backpack.tf/suggestion/5d822dc0d381720a4235e722

Suggestion for 8.5 keys

Total is 9 keys

Sale 17:

https://backpack.tf/profiles/76561198202476873#!/compare/1566604800/1566777600

https://backpack.tf/profiles/76561198069493147#!/compare/1566691200/1566777600

Sold with ~5 keys in sweets for CH Plat Pickel

use there

Sale 18:

https://marketplace.tf/items/tf2/626;5;u33

$22.34 / $1.84 = 12.14 keys

Total sales @:

9, 9, 11, 11, 11, 12.14, 13, 13, 14 keys

Taking 9 - 14 keys