Sale 1:

https://backpack.tf/profiles/76561198006544512#!/compare/1583884800/1583971200

https://backpack.tf/profiles/76561198985910282#!/compare/1583884800/1583971200

Transfer

sale 2:

https://backpack.tf/profiles/76561198985910282#!/compare/1583971200/1584057600

https://backpack.tf/profiles/76561198337734785#!/compare/1583971200/1584057600

untrace

sale 3:

https://backpack.tf/profiles/76561198337734785#!/compare/1586822400/1586908800

https://backpack.tf/profiles/76561198099018071#!/compare/1586822400/1586908800

keys

sale 4:

https://backpack.tf/profiles/76561198099018071#!/compare/1586908800/1586995200

https://backpack.tf/profiles/76561198236030772#!/compare/1586908800/1586995200

bulk

sale 5:

https://backpack.tf/profiles/76561198236030772#!/compare/1586908800/1586995200

https://backpack.tf/profiles/76561198850895547#!/compare/1586908800/1586995200

Sold with ~1 key in sweets for Snowblind Spiky + ~0.5 keys in sweets

Spiky Mini:

https://backpack.tf/suggestion/5ea6f9001b58745bfb5e542b

Suggestion for 13 keys

Total is 12.5 keys

Sale 6:

https://backpack.tf/profiles/76561198850895547#!/compare/1587081600/1587168000

https://backpack.tf/profiles/76561198209786857#!/compare/1586995200/1587081600

bulky

sale 7:

https://backpack.tf/profiles/76561198209786857#!/compare/1587081600/1587168000

https://backpack.tf/profiles/76561198045810811#!/compare/1587081600/1587168000

Bulk

sale 8:

https://backpack.tf/profiles/76561198341171690#!/compare/1586476800/1586563200

https://backpack.tf/profiles/76561198329940613#!/compare/1586390400/1586649600

Sold for 6 keys

sale 9:

https://backpack.tf/profiles/76561198329940613#!/compare/1586649600/1586736000

https://backpack.tf/profiles/76561198396499936#!/compare/1586649600/1586736000

Sold with 3 keys for CTFL Commander

Commander Mini

https://backpack.tf/suggestion/5ea6f81e07cfdd6ddd1f53a0

Suggestion for 13.5 keys

Total is 10.5 keys

sale 10:

https://backpack.tf/profiles/76561198396499936#!/compare/1586995200/1587081600

https://backpack.tf/profiles/76561198091171270#!/compare/1586995200/1587081600

sold for ~6.5 keys

sale 11:

https://backpack.tf/profiles/76561198799983169#!/compare/1586476800/1586563200

https://backpack.tf/profiles/76561198129380689#!/compare/1583366400/1586563200

https://backpack.tf/profiles/76561198964086825#!/compare/1586563200/1586649600

Untrace

Sale 12:

https://backpack.tf/profiles/76561198964086825#!/compare/1586649600/1586736000

https://backpack.tf/profiles/76561198878866368#!/compare/1586649600/1586736000

Bulk

sale 13:

https://backpack.tf/profiles/76561198341171690#!/compare/1580688000/1580774400

https://backpack.tf/profiles/76561198388239626#!/compare/1578355200/1580774400

Can trace 5 keys

sale 14:

https://backpack.tf/profiles/76561198841279602#!/compare/1583798400/1583884800

https://backpack.tf/profiles/76561198337734785#!/compare/1583798400/1583884800

Untrace

Total sales @:

6, 6.5, 10.5, 12.5 keys

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

5 month unsold for 10 keys,

taking 6 - 6.5 keys.