Credits †weezer and K1ng

|———Sale 1———|

History: https://backpack.tf/item/10350848339

https://marketplace.tf/items/tf2/31185;5;u61

Jun 10, 2022: $59.99 / $1.75 = 34.28 keys

rounding off to 34 keys

|———Sale 2———|

History: Unknown

https://marketplace.tf/items/tf2/31185;5;u61

Jun 27, 2022: $59.99 / $1.87 = 32.08 keys

rounding off to 32 keys

K1ng:

~22 keys via buy order

https://backpack.tf/profiles/76561198239692688#!/compare/1655164800/1657929600

https://gladiator.tf/time-machine?item=Miami+Nights+Brim+of+Fire&at=2022-07-11T20%3A20%3A00.000Z

Seems like 30 keys but not all can be seen

https://backpack.tf/profiles/76561199111658162#!/compare/1657843200/1657929600

https://backpack.tf/profiles/76561198259191033#!/compare/1657929600/1658188800

https://gladiator.tf/time-machine?item=Miami+Nights+Brim+of+Fire&at=2022-07-16T01%3A03%3A00.000Z

Bulk (credits Lemons)

https://backpack.tf/profiles/76561198178991293#!/compare/1660089600/1661040000

The 30 sale is not completely traceable, so I would probably exclude 34 to compensate and go with 32 flat.