GE California Cap (Minis are linked)

History 1: https://backpack.tf/item/9221812611

18 keys (only 18 of the 29 keys in seller's compare match and 18 keys match in buyer's compare too)
https://backpack.tf/profiles/76561198188093413#!/compare/1607472000/1607558400
https://backpack.tf/profiles/76561198090785419#!/compare/1607472000/1607558400


History 2: https://backpack.tf/item/9164642865

30 keys:
https://backpack.tf/profiles/76561198125791160#!/compare/1606521600/1606608000
https://backpack.tf/profiles/76561198065805500#!/compare/1606608000/1606953600


History 3: https://backpack.tf/item/9148694629

Untraceable:
https://backpack.tf/profiles/76561198000980532#!/compare/1606694400/1607644800
https://backpack.tf/profiles/76561198091502579#!/compare/1606694400/1606780800

Sold on marketplace.tf December 10, look below

only 5 keys match:
https://backpack.tf/profiles/76561198055400213#!/compare/1608336000/1608422400
https://backpack.tf/profiles/76561198081491001#!/compare/1608422400/1608508800

20 keys 2 ref, ~20 keys (the same matches in the buyer's compare, the rest went to the Rocket Jockey)
https://backpack.tf/profiles/76561198081491001#!/compare/1609286400/1609372800
https://backpack.tf/profiles/76561198097271466#!/compare/1609286400/1609372800

28 keys:
https://backpack.tf/profiles/76561198097271466#!/compare/1610582400/1610668800
https://backpack.tf/profiles/76561198133392504#!/compare/1610496000/1610668800

Sold for a Vivid Plasma Smoking Skid Lid + 8 keys
https://backpack.tf/profiles/76561198133392504#!/compare/1610928000/1611014400
https://backpack.tf/profiles/76561198039846030#!/compare/1611014400/1611100800
Lid mini at 28 keys https://backpack.tf/suggestion/602ff832489bf8780a35aff8
28+8=36
Buyout was 40, doesn't cap https://gladiator.tf/listings/600587f16b420f90ba9341d8

Sold for a Phosphorous Shooter's Sola Topi:
https://backpack.tf/profiles/76561198039846030#!/compare/1612051200/1612224000
https://backpack.tf/profiles/76561198055622215#!/compare/1612137600/1612224000
Using there beacuse the Topi doesn't have any other usable sales https://backpack.tf/item/1667645863

History 4: https://backpack.tf/item/9141222380

Untraceable:
https://backpack.tf/profiles/76561198831477246#!/compare/1608681600/1608768000
https://backpack.tf/profiles/76561198053044333#!/compare/1603238400/1610150400

Untraceable, none of the pure in buyer's compare matches:
https://backpack.tf/profiles/76561198053044333#!/compare/1610409600/1610496000
https://backpack.tf/profiles/76561198118534054#!/compare/1610496000/1610582400


Marketplace.tf sales: https://marketplace.tf/items/tf2/31117;5;u9
December 4: $49.99/1.76=28.4 ~28 keys
December 10: $69.99/1.81=38.67 ~39 keys


Unsolds: 40 keys for a month https://backpack.tf/item/9141222380


Sales at 18, 20, 28, 28, 30, 36, 39
Given the buyers up to 23.31-25 keys, 18-20 looks low. The sales at 36 and 39 look out of place too. 39 was Marketplace.tf and 36 is an item sale that doesn't cap.
Let's go 28-30