Sale 1:

Sold for $55 on marketplace.tf

https://marketplace.tf/items/30866;5;u61

Can’t find item’s history

http://manic.tf/keyprice/?at=2018-08-14 - 55/1.87 = ~29.41

X = 29

Sale 2:

Sold from scrap.tf for 28 keys + some ref

Seller: https://backpack.tf/profiles/76561198135388328#!/compare/1533859200/1533945600

Buyer: https://backpack.tf/profiles/76561198059461311#!/compare/1533859200/1533945600

https://backpack.tf/item/6874562704

X = 28

Sale 3:

Sold for 27 keys

Seller: https://backpack.tf/profiles/76561198081172172#!/compare/1532044800/1532131200

Buyer: https://backpack.tf/profiles/76561197993332040#!/compare/1531958400/1532131200

https://backpack.tf/item/6874562704

X = 27

Sale 4:

Sold to scrap.tf for 26 keys + some ref

Seller: https://backpack.tf/profiles/76561198095236132#!/compare/1532217600/1532304000

Buyer: https://backpack.tf/profiles/76561198135388328#!/compare/1532217600/1532304000

https://backpack.tf/item/6874562704

X = 26

Sale 5:

Sold for 17 keys?

Seller: https://backpack.tf/profiles/76561197993332040#!/compare/1532217600/1532304000

Buyer: https://backpack.tf/profiles/76561198095236132#!/compare/1532217600/1532304000

https://backpack.tf/item/6874562704

X = 17

Untraceable/Unusable sales:

#1

Untraceable

Seller: https://backpack.tf/profiles/76561198258202958#!/compare/1530057600/1532131200

Buyer: https://backpack.tf/profiles/76561198272076942#!/compare/1529712000/1530057600

https://backpack.tf/item/6919975052

#2

Untraceable

Seller: https://backpack.tf/profiles/76561198272076942#!/compare/1529712000/1530057600

Buyer: https://backpack.tf/profiles/76561198054758757#!/compare/1529971200/1530057600

https://backpack.tf/item/6919975052

#3

Backpack buy from a scammer alt

Seller: https://backpack.tf/profiles/76561198439162843#!/compare/1531699200/1531958400

Buyer: https://backpack.tf/profiles/76561198081172172#!/compare/1531872000/1531958400

https://backpack.tf/item/6874562704

Sellers:

https://i.imgur.com/RlD9nYs.png

https://backpack.tf/item/5818054690 - 29 keys

https://backpack.tf/item/6083521873 - 32 keys

https://backpack.tf/item/6919975052 - 35 keys

Sales at:

17

26

27

28

29

17 is way too low, excluding.

26 went to scrap.tf, excluding 26.

Going with 27-29.