Sale 1:

https://backpack.tf/profiles/76561198123899074#!/compare/1524960000/1525046400

https://backpack.tf/profiles/76561198166067003#!/compare/1524960000/1525046400

Sold for 27 pure.

Sale 2:

https://backpack.tf/profiles/76561198166067003#!/compare/1526342400/1526428800

https://backpack.tf/profiles/76561198128953533#!/compare/1526342400/1526428800

Sold for 22 keys.

Sale 3:

https://backpack.tf/profiles/76561198128953533#!/compare/1526515200/1526601600

https://backpack.tf/profiles/76561198069980430#!/compare/1526515200/1526601600

Sold for Phosphorous Bloke Hat, sold quickly for 20 keys + 14 ref.

Sale 4:

https://backpack.tf/profiles/76561198069980430#!/compare/1526688000/1526774400

https://backpack.tf/profiles/76561198321019586#!/compare/1526688000/1526774400

Untraceable.

Sale 5:

https://backpack.tf/profiles/76561198321019586#!/compare/1526688000/1526774400

https://backpack.tf/profiles/76561198141054773#!/compare/1526688000/1526774400

Sold for 22 keys + negligible rec.

Sale 6:

https://backpack.tf/profiles/76561198141054773#!/compare/1527033600/1527120000

https://backpack.tf/profiles/76561198454918384#!/compare/1526947200/1527120000

Sold for 25 keys + 1.82 keys in sweets.

Sale 7:

https://backpack.tf/profiles/76561198454918384#!/compare/1526947200/1527120000

https://backpack.tf/profiles/76561198224899376#!/compare/1527033600/1527120000

Sold with Negligible scraps for OF Salty Dog

Salty Mini:

https://backpack.tf/profiles/76561198283271543#!/compare/1526688000/1526774400

https://backpack.tf/profiles/76561198052486168#!/compare/1526688000/1526774400

Sold for 24 keys + 10.94 in sweets

Total is 24.40 keys

https://backpack.tf/profiles/76561198080179568#!/compare/1525478400/1525564800

https://backpack.tf/profiles/76561198149877756#!/compare/1525564800/1526428800

Sold for 28 keys + 1.68 keys in ref

Total is 29.68 keys.

Taking average of 27 keys.

Total is 27 keys.

Sale 8:

https://backpack.tf/profiles/76561198131986842#!/compare/1526342400/1526428800

https://backpack.tf/profiles/76561198232041512#!/compare/1526342400/1526428800

Sold for Phantasm Jr. Copper

https://backpack.tf/suggestion/5b0a2376cf6c7526e3025cf1

Copper has suggestion for 30 keys.

Total sales @:

20.51, 22, 22, 24.40, 26.82, 27, 27, 30

https://i.imgur.com/lexo0vm.jpg

Seller for 28, Buyers up to 22.

Taking 27 - 30 keys (leaving 24 out as its closeer to sellers than 26.82)