Re-sugestion, thanks to Blaze & Jarool for the correction!

Sale 1:

https://backpack.tf/profiles/76561198046921199#!/compare/1530748800/1530835200

https://backpack.tf/profiles/76561198083047491#!/compare/1530748800/1530835200

Untrace.

Sale 2:

https://backpack.tf/profiles/76561198083047491#!/compare/1532217600/1532563200

https://backpack.tf/profiles/76561198082070035#!/compare/1532476800/1532563200

Sold for 15 keys + negligible sweets

Sale 3:

https://backpack.tf/profiles/76561198082070035#!/compare/1532563200/1532649600

https://backpack.tf/profiles/76561198146749756#!/compare/1532476800/1532563200

Sold with ~3 keys in sweets for Stormy Defiant(14.5)

Total is 11.5 keys

Sale 4:

https://backpack.tf/profiles/76561197993931314#!/compare/1530489600/1530576000

https://backpack.tf/profiles/76561198310130481#!/compare/1530403200/1530489600

Sold with 4 keys for Planets Company Mann

Mann Mini:

https://backpack.tf/suggestion/5b88893acf6c756e2d2d9211

Suggestion for 17 keys

Total is 13 keys

Sale 5:

https://backpack.tf/profiles/76561198310130481#!/compare/1530489600/1530662400

https://backpack.tf/profiles/76561198157150131#!/compare/1530576000/1530662400

Sold for Showstopper RPS(13.5) + ~3 keys in sweets

Total is 16.5 keys

Sale 6:

https://backpack.tf/profiles/76561198157150131#!/compare/1530662400/1530835200

https://backpack.tf/profiles/76561198170098378#!/compare/1530144000/1530748800

Sold for Hot Blitzkreig FT Revolver(23)

Sale 7:

https://backpack.tf/profiles/76561198170098378#!/compare/1530835200/1530921600

https://backpack.tf/profiles/76561198129737868#!/compare/1530748800/1530835200

Lot of stuff, looks low tho.

Sale 8:

https://backpack.tf/profiles/76561198129737868#!/compare/1531094400/1531267200

https://backpack.tf/profiles/76561198264263249#!/compare/1531008000/1531094400

Sold for 8 keys + 10 ref

Sale 9:

https://backpack.tf/profiles/76561198264263249#!/compare/1531612800/1531785600

Sold for HG Guadjalara

Use there.

Sale 10:

https://backpack.tf/profiles/76561198043601552#!/compare/1531699200/1531785600

https://backpack.tf/profiles/76561198094129354#!/compare/1531699200/1531785600

Honcho or keys, can't tell

Sale 11:

https://backpack.tf/profiles/76561198094129354#!/compare/1535155200/1535328000

https://backpack.tf/profiles/76561198268423957#!/compare/1534982400/1535328000

Sold for Steaming Front Runner + Cyclone Bunnyhopper(9.5) + 2 keys

Use there, unable to mini.

Sale 12:

https://backpack.tf/profiles/76561198268423957#!/compare/1535328000/1535414400

https://backpack.tf/profiles/76561197964171516#!/compare/1535328000/1535414400

Sold for Stormy Warhood

Use there.

Total sales @:

8.29, 11.5, 13, 15, 16.5, 23 keys

Blaze's Part:

for sale 3 i'm unsure where you're getting 3~ in sweets from as the sticky added last sale on scm was around 5.5~ and there is a buyer in classies for that at 4 keys

https://steamcommunity.com/market/listings/440/Strange%20Blitzkrieg%20Stickybomb%20Launcher%20%28Factory%20New%29

https://backpack.tf/stats/Strange%20Decorated%20Weapon/Blitzkrieg%20%7C%20Stickybomb%20Launcher%20(Factory%20New)/Tradable/Craftable

Taking 13 - 17 keys