Sale 1:

https://backpack.tf/profiles/76561198163036255#!/compare/1544832000/1545004800

https://backpack.tf/profiles/76561198127938353#!/compare/1545436800/1545523200

Untrace

Sale 2:

https://backpack.tf/profiles/76561198127938353#!/compare/1546300800/1546387200

https://backpack.tf/profiles/76561198251214662#!/compare/1546300800/1546387200

Sold for DBD Slouch

Slouch Mini:

https://backpack.tf/suggestion/5c3ac9c2cf6c752dd411fc6a

Suggestion for 21.5 keys

Sale 3:

https://backpack.tf/profiles/76561198251214662#!/compare/1546300800/1546387200

https://backpack.tf/profiles/76561198375554825#!/compare/1546300800/1546387200

Sold for 22 keys

Sale 4:

https://backpack.tf/profiles/76561198159569672#!/compare/1540339200/1540425600

https://backpack.tf/profiles/76561198156255538#!/compare/1540339200/1540425600

Sold for 14 keys

Sale 5:

https://backpack.tf/profiles/76561198156255538#!/compare/1541376000/1541462400

https://backpack.tf/profiles/76561198091681165#!/compare/1541462400/1541548800

Sold for Cool Corsair Scattergun WW(30.5)

Sale 6:

https://backpack.tf/profiles/76561198080179568#!/compare/1542326400/1542412800

https://backpack.tf/profiles/76561198057275188#!/compare/1541289600/1542499200

Sold for 20 keys

Sale 7:

https://backpack.tf/profiles/76561198057275188#!/compare/1543017600/1543104000

https://backpack.tf/profiles/76561198049847929#!/compare/1542931200/1543017600

Bulk

Sale 8:

https://backpack.tf/profiles/76561198049847929#!/compare/1543363200/1543622400

https://backpack.tf/profiles/76561198189960814#!/compare/1543536000/1543622400

Sold for 17 keys + ~1 key in sweets

Total is 18 keys

Sale 9:

https://backpack.tf/profiles/76561198189960814#!/compare/1544659200/1544745600

https://backpack.tf/profiles/76561198177791641#!/compare/1544659200/1544745600

Sold for Doorway Mann O' War

Looks high.

Sale 10 - 12:

https://marketplace.tf/items/30893;5;u15

Sold for 20.11, 39.99, 44.99 USD

Keys at 1.76, 1.77, 1.75 USD

Totals are 11.43, 22.59, 25.71 keys

Total sales @:

11.43, 14, 18, 20, 21.5, 22, 22.59, 25.71, 30.5 keys

Buyers up to 14 keys,

Gonna call 30.5 too high,

Taking 18 - 26 keys.