mini

History #1 - https://backpack.tf/item/12420710012

Sale #1 - using there

https://backpack.tf/profiles/76561198131423270#!/compare/1708646400/1708732800

https://backpack.tf/profiles/76561199183171982#!/compare/1708646400/1708732800

History #2 - https://backpack.tf/item/12456121447

Sale #1 - untrace

https://backpack.tf/profiles/76561198188093413#!/compare/1707177600/1707264000

https://backpack.tf/profiles/76561199203280991#!/compare/1707264000/1707350400

History #3 - https://backpack.tf/item/12848337846

Sale #1 - account transfer

https://backpack.tf/profiles/76561198188093413#!/compare/1706140800/1706227200

https://backpack.tf/profiles/76561199084282838#!/compare/1705968000/1706227200

History #4 - https://backpack.tf/item/12430175781

Sale #1 https://marketplace.tf/items/tf2/31335;5;u276

34.99 / 1.7 = 20.58 keys, rounded to 21 keys

History #5 - https://backpack.tf/item/12809364161

Sale #1 - trade back

https://backpack.tf/profiles/76561198184795951#!/compare/1702857600/1703203200

https://backpack.tf/profiles/76561199085308746#!/compare/1703116800/1703203200

Sale #2 - untrace

https://backpack.tf/profiles/76561199085308746#!/compare/1704067200/1704153600

https://backpack.tf/profiles/76561198165588807#!/compare/1701734400/1704412800

History #6 - https://backpack.tf/item/13170700072

Sale #1 - untrace

https://backpack.tf/profiles/76561198866531525#!/compare/1704153600/1704412800

https://backpack.tf/profiles/76561199152290067#!/compare/1698796800/1704844800

Sale #2 - untrace

https://backpack.tf/profiles/76561198363395191#!/compare/1707609600/1707782400

https://backpack.tf/profiles/76561199152290067#!/compare/1707264000/1710979200

History #7 - https://backpack.tf/item/12432502357

Sales 1 - 7, all gambling

Sale #8 - 14 keys

https://backpack.tf/profiles/76561199102430997#!/compare/1704153600/1704240000

https://backpack.tf/profiles/76561198191156130#!/compare/1704240000/1704326400

Sale #9 - untrace

https://backpack.tf/profiles/76561199085308746#!/compare/1704412800/1704499200

https://backpack.tf/profiles/76561198191156130#!/compare/1704412800/1704499200

Sale #10 - untrace

https://backpack.tf/profiles/76561199085308746#!/compare/1705708800/1705795200

https://backpack.tf/profiles/76561198137922081#!/compare/1705622400/1705795200

Sale #11 - 15 keys

https://backpack.tf/profiles/76561198137922081#!/compare/1708041600/1708214400

https://backpack.tf/profiles/76561198231123404#!/compare/1708128000/1708214400

Sale #12 - scammed

https://backpack.tf/profiles/76561198231123404#!/compare/1708214400/1708300800

https://backpack.tf/profiles/76561198835694899#!/compare/1699488000/1708300800

History #8 - https://backpack.tf/item/12519163354

Sales 1-3, all gambling

Sale #4 - untrace

https://backpack.tf/profiles/76561198938868748#!/compare/1706054400/1706486400

https://backpack.tf/profiles/76561199135952616#!/compare/1706400000/1706486400

Sale #5 - bot to owner

https://backpack.tf/profiles/76561199135952616#!/compare/1706486400/1706400000

https://backpack.tf/profiles/76561199069442401#!/compare/1706400000/1706486400

----

All sales being 21, 14, 15 keys

Given seller at 18.9, gonna exclude 21 - https://gyazo.com/f0e21d1f0b4c57b16204ad0933d93910