History 1: https://backpack.tf/item/9745208331

Galvanic Defiance Taunt: Skullcracker + 10 keys + 24.11 ref:

https://backpack.tf/profiles/76561198453530349#!/compare/1644019200/1644105600

https://backpack.tf/profiles/76561198390650472#!/compare/1644105600/1644192000

Skullcracker has buyers at ~6 keys, which will make this sale ~16 keys, which is the buyout https://gladiator.tf/listings/61fdd567d9bbd04fa8909ef0

History 2: https://backpack.tf/item/9516350423

IDs don't match but was likely 16:

https://backpack.tf/profiles/76561199111658162#!/compare/1642896000/1642982400

https://backpack.tf/profiles/76561198091502579#!/compare/1642896000/1643068800

buyout was 18 https://gladiator.tf/listings/61ecaf69939b5d7cb6c04398

https://marketplace.tf/items/tf2/31129;5;u62

$35.99 / $1.74 = 20.68 keys ~21 keys

taking 16-21 keys here, there's one buyer at 16 right now but 2 sales support that end of the range and it wasn't low at the time