Sale 1:

https://backpack.tf/profiles/76561198337734785#!/compare/1524873600/1524960000

https://backpack.tf/profiles/76561197976524938#!/compare/1524873600/1524960000

Sold for 21 keys (Counted them individually) + 12 ref

Sale 2:

https://backpack.tf/profiles/76561197976524938#!/compare/1525392000/1525478400

https://backpack.tf/profiles/76561197994697258#!/compare/1525392000/1525478400

Bulk, use there.

Sale 3:

https://backpack.tf/profiles/76561197994697258#!/compare/1525564800/1525651200

https://backpack.tf/profiles/76561198152247170#!/compare/1525478400/1525564800

Bulk.

Sale 4:

https://backpack.tf/profiles/76561198053720151#!/compare/1525996800/1526083200

https://backpack.tf/profiles/76561198074184778#!/compare/1525996800/1526083200

Unable to tell what exactly it sold for.

Sale 5:

https://backpack.tf/profiles/76561198074184778#!/compare/1526083200/1526169600

https://backpack.tf/profiles/76561198296767761#!/compare/1526083200/1526169600

Bulk.

Sale 6:

https://backpack.tf/profiles/76561198296767761#!/compare/1526169600/1526256000

https://backpack.tf/profiles/76561198131986842#!/compare/1526169600/1526256000

Sold with 2 keys for Searing Trilby + HG Battin'

Trilby Mini:

https://backpack.tf/suggestion/5b15921acf6c757eef0fc603

Suggestion for 18 keys.

Battin' Mini:

https://marketplace.tf/items/1117;5;u3003

Sales for 21, 17.45, 17.5, 21.45 USD

Keys at 1.95, 1.97, 1.97, 1.98

Totals are 10.77, 8.86, 8.89, 10.83

https://backpack.tf/profiles/76561198305676157#!/compare/1524873600/1524960000

https://backpack.tf/profiles/76561198058600622#!/compare/1524787200/1524960000

Sold for 8 keys

Taking 8 - 9 keys, average of 8.5

Total is 26.5 - 2 = 24.5 keys.

Sale 7:

https://backpack.tf/profiles/76561198131986842#!/compare/1526256000/1526342400

https://backpack.tf/profiles/76561198173027559#!/compare/1526256000/1526342400

Sold with 2 keys + 1.6 keys in sweets for D@D Bombing Run.

Bombing Mini:

https://backpack.tf/suggestion/5b0b048444325a24bd79f926

Suggestion for 28.5 keys

Total is 24.9 keys

Total sales @:

21, 24.5, 24.9

Taking 21 - 25 keys.