Re-suggestion, thanks to K1NG for the info!

Sale 1:

https://backpack.tf/profiles/76561198098096360#!/compare/1524873600/1525305600

https://backpack.tf/profiles/76561198327837250#!/compare/1525219200/1525305600

Sold for Planets Hoodie + Blizzardy Snaggle(11)

Unable to mini Hoodie

Sale 2:

https://backpack.tf/profiles/76561198327837250#!/compare/1525392000/1525478400

https://backpack.tf/profiles/76561198166845415#!/compare/1525564800/1525737600

https://steamcommunity.com/market/listings/440/Unusual%20Geometrical%20Teams%20Rocket%20Launcher%20%28Battle%20Scarred%29

SCM Sale for 89.82 CAD

Keys at 3.12 CAD

Total is 28.79 keys

Sale 3:

https://backpack.tf/profiles/76561198166845415#!/compare/1526342400/1526428800

https://backpack.tf/profiles/76561198069326122#!/compare/1526342400/1526428800

Sold for 14 keys (Came from spelled Dead of Night)

Sale 4:

https://backpack.tf/profiles/76561198069326122#!/compare/1527206400/1527292800

https://backpack.tf/profiles/76561198030343929#!/compare/1527206400/1527292800

Untraceable

Sale 5:

https://backpack.tf/profiles/76561198030343929#!/compare/1527811200/1527897600

https://backpack.tf/profiles/76561198069501011#!/compare/1527811200/1527897600

Sold for 29 keys in items / keys

Sale 6:

https://backpack.tf/profiles/76561198069501011#!/compare/1527984000/1528243200

Bulk.

Sale 7:

https://backpack.tf/profiles/76561198106843393#!/compare/1528243200/1528329600

https://backpack.tf/profiles/76561198035702959#!/compare/1528243200/1528329600

Sold for Hot FT Clover Shotgun

Shotgun Mini:

https://backpack.tf/profiles/76561198089253101#!/compare/1526083200/1526169600

https://backpack.tf/profiles/76561198001812215#!/compare/1526083200/1526169600

Sold for ~29 keys in items (May be worth double checking)

K1NG's Part:

You can use sellers as a rough guess for minor parts of a trade. Sale 1 will be around 21.

Sale 2 is closer to 26 keys ($64.44/$2.49).

Other sale: Sold for 24 keys

https://backpack.tf/profiles/76561198067714525#!/compare/1529452800/1529539200

21-29 should work.