Re-suggestion, thanks to K1ng And Foamy for the info!

Sale 1:

https://backpack.tf/profiles/76561198097283109#!/compare/1524182400/1524268800

https://backpack.tf/profiles/76561198081129776#!/compare/1524182400/1524268800

Untraceable.

Sale 2:

https://backpack.tf/profiles/76561198081129776#!/compare/1524528000/1524614400

https://backpack.tf/profiles/76561198225715416#!/compare/1524528000/1524614400

Sold with 10 keys for Harvest Bonk Helm(72.5)

Total is 62.5 keys

Sale 3:

https://backpack.tf/profiles/76561198225715416#!/compare/1524614400/1524700800

https://backpack.tf/profiles/76561198292242424#!/compare/1524614400/1524700800

Sold with 13 keys for CPS Casemaker

Unable to mini

Sale 4:

https://backpack.tf/profiles/76561198292242424#!/compare/1524960000/1525132800

https://backpack.tf/profiles/76561198069980430#!/compare/1525132800/1525219200

Sold for Ooze Larrikin + HG Hetman + 4 keys

Larrikin Mini:

https://backpack.tf/suggestion/5b1c55c3cf6c7514f93e3727

Suggestion for 44 keys.

Hetman Mini:

https://backpack.tf/suggestion/5b1c6467cf6c752ecb76caeb

Suggestion for 17 keys

Total is 65 keys.

http://www.tf2outpost.com/trade/29626562

B/O of 40 keys

Capping there.

Sale 5:

https://backpack.tf/profiles/76561198069980430#!/compare/1525564800/1525651200

https://backpack.tf/profiles/76561198118601370#!/compare/1525478400/1525564800

Sold for CH Tundra Top (use there)

Sale 6:

https://backpack.tf/profiles/76561198056793444#!/compare/1525651200/1525737600

https://backpack.tf/profiles/76561198118601370#!/compare/1525564800/1525737600

Sold with ~10 keys in sweets for DBD Lid

Using there.

Sale 7:

https://marketplace.tf/items/30019;5;u14

Sale for 110 USD

Keys at 1.96 USD

Total is 56.12 keys

Total sales @:

38, 40, 56.12, 62.5

Calling 38 & 40 outliers, closer to Buyers than to 56.

https://i.imgur.com/jbC1BCg.jpg

K1NG's Part:

Sale 2 was the one that had a B/O of 40, not sale 4. There's also a hidden Chopperbot listing at 46

https://imgur.com/a/QrUJNBt

https://backpack.tf/item/4624329075

So this should be 40-56, while the Heart Tundra sale should be used there:

https://backpack.tf/suggestion/5afc3a5ecf6c750dd92d2932