Sale #1

History: https://backpack.tf/item/9422846007

https://backpack.tf/profiles/76561198263836417#!/compare/1621209600/1621296000

44 keys pure

Marketplace sales

Item: https://marketplace.tf/items/tf2/31143;5;u16

$159.99/$2.1 = 76 Keys [March 28 2021]

$139.99/$2.15 = 65 Keys [April 1 2021]

$139.99/$2 = 70 Keys [May 5 2021]

$139.99/$2 = 70 Keys [May 11 2021]

$139.99/$2 = 70 Keys [May 16 2021]

$139.99/$2 = 70 Keys [May 18 2021]

$139.99/$2 = 70 Keys [May 20 2021]

$139.99/$2 = 70 Keys [May 25 2021]

$139.99/$2 = 70 Keys [May 27 2021]

$139.99/$2 = 70 Keys [June 1 2021]

Going with 65 - 70 keys range here as there are many sales for this price and excluding 44 keys as its lower than current buyers and 76 keys seems higher.