Sale 1:

https://backpack.tf/profiles/76561198277435514#!/compare/1579910400/1581120000

https://backpack.tf/profiles/76561198202053684#!/compare/1581033600/1581206400

Sold with 1 key for HG Sky High

use there

sale 2:

https://backpack.tf/profiles/76561198197118415#!/compare/1586995200/1587168000

https://backpack.tf/profiles/76561198273675032#!/compare/1586908800/1586995200

sold for ~8.5 keys

sale 3:

https://backpack.tf/profiles/76561198273675032#!/compare/1587168000/1587254400

https://backpack.tf/profiles/76561198070266530#!/compare/1587168000/1587254400

https://backpack.tf/profiles/76561198161378521#!/compare/1582502400/1587254400

Untrace

sale 4:

https://backpack.tf/profiles/76561198190381149#!/compare/1583020800/1584144000

https://backpack.tf/profiles/76561198018701949#!/compare/1565481600/1585526400

Untrace

Sale 5:

https://backpack.tf/profiles/76561198002757046#!/compare/1580256000/1580342400

https://backpack.tf/profiles/76561198123177303#!/compare/1580342400/1580428800

Sold for TW Scrap

Scrap Mini:

https://backpack.tf/suggestion/5ea411fa3167965ce1269db1

Suggestion for 11 keys

Sale 6:

https://backpack.tf/profiles/76561198123177303#!/compare/1580688000/1580860800

https://backpack.tf/profiles/76561198079334270#!/compare/1580601600/1580774400

Sold with ~1.5 keys in sweets for Steaming Company

company Mini:

https://backpack.tf/suggestion/5ea4109cbc53bf412f55cb3a

suggestion for 12.5 keys

total is 11 keys

sale 7:

https://marketplace.tf/items/tf2/30313;5;u36

$20.29 / $1.75 = 11.59 keys <--- https://backpack.tf/item/5139452623

$23 / $1.80 = 12.78 keys <--- https://backpack.tf/item/7507283654

Total sales @:

8.5, 11, 11, 12, 13 keys

buyers up to 8.5 keys,

https://i.imgur.com/x7neZj2.jpg

taking 11 - 13 keys