The Sale:

Sold for $67.50 on marketplace.tf

https://marketplace.tf/items/30658;5;u11

https://backpack.tf/item/6977714684 - May have been this one, though I included all sales on this history on the “Other Sales” section below.

http://manic.tf/keyprice/?at=2018-07-22 - $67.50 / $1.95 = 34.62 keys

X = 35

Other Sales:

#1

Probably gambled

https://backpack.tf/profiles/76561198023634981#!/compare/1530921600/1531526400

https://backpack.tf/profiles/76561198828179073#!/compare/1531526400/1531612800

#2

Untraceable, probably gambled again

https://backpack.tf/profiles/76561198828179073#!/compare/1532044800/1533513600

https://backpack.tf/profiles/76561198127226953#!/compare/1530921600/1532217600

#3

Untraceable, dumped on scrap.tf

https://backpack.tf/profiles/76561198127226953#!/compare/1532217600/1535500800

https://backpack.tf/profiles/76561198135388328#!/compare/1532390400/1532476800

#4

Sold to a quickbuyer for an unknown amount of keys

https://backpack.tf/profiles/76561198336979032#!/compare/1528502400/1528588800

https://backpack.tf/profiles/76561198002757046#!/compare/1528416000/1528502400

Sellers:

~33 keys: - Scrap.tf

https://i.imgur.com/0xnc3yt.png

https://backpack.tf/item/6977714684

https://backpack.tf/profiles/76561198135388328#!/compare/1532390400/1532476800 - Obtained ~25th July

https://i.imgur.com/6ogsAes.png - Was formerly ~33 keys and 10 ref, which is still 33 keys, so that shouldn’t affect the price here.

34 keys:

https://i.imgur.com/tQnX8qI.png

https://backpack.tf/item/6893927799

https://backpack.tf/item/7006559628

Sales at:

35

Aged sellers at 33-34.

Going with 33-35.