Sale 1:

https://backpack.tf/profiles/76561198842201154#!/compare/1582329600/1584576000

https://backpack.tf/profiles/76561198028078806#!/compare/1582761600/1584057600

Untrace

Sale 2:

https://backpack.tf/profiles/76561198850274253#!/compare/1586563200/1586649600

https://backpack.tf/profiles/76561198928574468#!/compare/1586476800/1586563200

Untrace

sale 3:

https://backpack.tf/profiles/76561198928574468#!/compare/1586649600/1586736000

https://backpack.tf/profiles/76561198342979708#!/compare/1575504000/1587081600

Untrace

Sale 4:

https://backpack.tf/profiles/76561198342979708#!/compare/1587081600/1587168000

https://backpack.tf/profiles/76561198123796333#!/compare/1587081600/1587168000

Sold for Searing Airdog(9.5) + negligible sweets

Total is ~10 keys, rounds up.

sale 5:

https://backpack.tf/profiles/76561198075921927#!/compare/1585440000/1585526400

https://backpack.tf/profiles/76561198094889693#!/compare/1585353600/1585440000

Untrace

sale 6:

https://backpack.tf/profiles/76561198204574817#!/compare/1579910400/1580256000

https://backpack.tf/profiles/76561198879007692#!/compare/1579996800/1580342400

SCM

Sale 7:

https://backpack.tf/profiles/76561198879007692#!/compare/1580860800/1580947200

https://backpack.tf/profiles/76561198179783329#!/compare/1580860800/1580947200

https://backpack.tf/profiles/76561198395110551#!/compare/1580947200/1581120000

https://backpack.tf/profiles/76561198177719569#!/compare/1581033600/1581120000

https://backpack.tf/profiles/76561198061353482#!/compare/1580601600/1581120000

Untrace / bulk

Sale 8:

https://backpack.tf/profiles/76561198318519201#!/compare/1581984000/1582156800

https://backpack.tf/profiles/76561198042439141#!/compare/1582070400/1582156800

https://backpack.tf/profiles/76561198027152204#!/compare/1582070400/1582156800

https://backpack.tf/profiles/76561198012895150#!/compare/1581897600/1582156800

Untrace

sale 9:

https://backpack.tf/profiles/76561197999873164#!/compare/1586908800/1586995200

https://backpack.tf/profiles/76561197970574866#!/compare/1586476800/1586908800

Untrace

sale 10:

https://backpack.tf/profiles/76561199000043065#!/compare/1585008000/1585094400

https://backpack.tf/profiles/76561198069493147#!/compare/1585008000/1585094400

QS

sale 11:

https://backpack.tf/profiles/76561198069493147#!/compare/1585094400/1585180800

https://backpack.tf/profiles/76561198126681452#!/compare/1585094400/1585180800

Sold for Planets Sober + ~3 keys in sweets

Sober Mini:

https://backpack.tf/suggestion/5eadd692b4aa9045914bb7e5

Suggestion for 7.5 keys

Total is 10.5 keys

Sale 12:

https://marketplace.tf/items/tf2/30014;5;u58

$14.07 / $1.70 = 8.28 keys

Total sales @:

7.5, 10, 10.5 keys

buyers up to ~7.5 keys,

taking 10 -11 keys