Sale 1:

https://backpack.tf/profiles/76561198237914408#!/compare/1564099200/1565481600

https://backpack.tf/profiles/76561198203587900#!/compare/1549756800/1566086400

Untrace

Sale 2:

https://backpack.tf/profiles/76561198137316054#!/compare/1560729600/1560902400

https://backpack.tf/profiles/76561198002757046#!/compare/1560729600/1560902400

Sold for ~17 keys

Sale 3:

https://backpack.tf/profiles/76561198002757046#!/compare/1563321600/1563408000

https://backpack.tf/profiles/76561198841796245#!/compare/1563321600/1563408000

Sold for ~18 keys

Sale 4:

https://backpack.tf/profiles/76561198841796245#!/compare/1563321600/1563408000

https://backpack.tf/profiles/76561198136334765#!/compare/1563321600/1563408000

Sold for Bubbling Tundra + 6 keys

use there

Sale 5:

https://backpack.tf/profiles/76561198136334765#!/compare/1563494400/1563667200

https://backpack.tf/profiles/76561198854662187#!/compare/1563580800/1563926400

Sold for KaW Esteem + Cyclone Victory(10.5) + ~3 keys in sweets

Esteem Mini:

https://backpack.tf/suggestion/5d7adca4d3817263a70f4a3c

Suggestion for 8 keys

Total is 21.5 keys

https://bot.tf/stats/listings/Y7D6LQR8

B/O of 26 keys

Sale 6:

https://backpack.tf/profiles/76561198854662187#!/compare/1563580800/1563926400

https://backpack.tf/profiles/76561198075491803#!/compare/1563840000/1563926400

Sold for Open Handcraft(16.5) + 3 keys

Total is 19.5 keys

Sale 7:

https://backpack.tf/profiles/76561198075491803#!/compare/1563840000/1563926400

https://backpack.tf/profiles/76561198305494036#!/compare/1563840000/1563926400

Sold for ~17 keys

Sale 8:

https://backpack.tf/profiles/76561198305494036#!/compare/1568160000/1568246400

https://backpack.tf/profiles/76561198172363295#!/compare/1567900800/1568246400

Sold for 20 keys

Sale 9, 10:

https://marketplace.tf/items/tf2/30018;5;u107

$35 / $1.82 = 19.23 keys

$40 / $1.83 = 21.86 keys

Total sales @:

17, 17, 18, 19.23, 19.5, 21.5, 21.86 keys

Taking 17 - 22 keys