Sale 1:

Sold for 11 keys

Seller: https://backpack.tf/profiles/76561198337734785#!/compare/1550620800/1550707200

Buyer: https://backpack.tf/profiles/76561198867661640#!/compare/1550620800/1550707200

https://backpack.tf/item/191823851

X = 11

Sale 2:

Sold to a bot for 10 keys + 5 ref

Seller: https://backpack.tf/profiles/76561198867661640#!/compare/1550620800/1550707200

Buyer: https://backpack.tf/profiles/76561198448207173#!/compare/1550620800/1550707200

https://backpack.tf/item/191823851

X = 10

Sale 3:

Sold for 10 keys

Seller: https://backpack.tf/profiles/76561198840607542#!/compare/1552953600/1553040000

Buyer: https://backpack.tf/profiles/76561198112194208#!/compare/1552867200/1552953600

https://backpack.tf/item/191823851

X = 10

Marketplace Sales:

https://marketplace.tf/items/108;5;u6

https://manic.tf/keyprice/?at=2018-12-28 - $23.57 / $1.79 = 13.17 keys

Other sale went to a quickbuyer, excluding.

X = 13

Other Sales:

https://backpack.tf/item/415176320 (#1 & #2)

https://backpack.tf/item/281121937 (#3)

https://backpack.tf/item/191823851 (#4-10)

https://backpack.tf/item/3428569454 (#11-14)

https://backpack.tf/item/170527288 - scrap

#1

Untraceable

https://backpack.tf/profiles/76561198337734785#!/compare/1547164800/1547251200

https://backpack.tf/profiles/76561198273661463#!/compare/1548892800/1549324800 - no good compare available

The 2nd link most likely isn’t even the buyer.

#2

Backpack transfer or something

https://backpack.tf/profiles/76561198273661463#!/compare/1549756800/1550188800

https://backpack.tf/profiles/76561198018502843#!/compare/1480032000/1550016000

#3

Sold to a quickbuyer

https://backpack.tf/profiles/76561198098406144#!/compare/1545868800/1546387200

https://backpack.tf/profiles/76561198337734785#!/compare/1545868800/1545955200

Can’t tell exactly how much it sold for, some of the contents are missing.

#4

Untraceable

https://backpack.tf/profiles/76561198337734785#!/compare/1546128000/1546214400

https://backpack.tf/profiles/76561198453534363#!/compare/1534809600/1548892800 - No good compare available

#5

Untraceable

https://backpack.tf/profiles/76561198236814044#!/compare/1550275200/1550361600

https://backpack.tf/profiles/76561198337734785#!/compare/1550275200/1550361600

#6

Untraceable

https://backpack.tf/profiles/76561198236814044#!/compare/1550275200/1550361600

https://backpack.tf/profiles/76561198337734785#!/compare/1550448000/1550534400

#7

Untraceable

https://backpack.tf/profiles/76561198448207173#!/compare/1551052800/1551225600

https://backpack.tf/profiles/76561198282759422#!/compare/1551225600/1551398400 (no good compare available)

#8

Sold for ’72 Squeezebox

https://backpack.tf/profiles/76561198282759422#!/compare/1551225600/1551398400 (no good compare available)

https://backpack.tf/profiles/76561198165055074#!/compare/1551139200/1551225600

Can be used on the taunt.

#9

Untraceable

https://backpack.tf/profiles/76561198165055074#!/compare/1551744000/1551830400

https://backpack.tf/profiles/76561198337734785#!/compare/1551744000/1551830400

#10

Sold for Steaming Fedora

https://backpack.tf/profiles/76561198337734785#!/compare/1552694400/1552780800

https://backpack.tf/profiles/76561198840607542#!/compare/1552694400/1552780800

Can be used on the Fedora. If it was used here, it would end up capping at zol’s b/o, and not affect the range here.

#11

Sold for Purple Confetti Bombing Run

https://backpack.tf/profiles/76561198069825031#!/compare/1546300800/1546387200

https://backpack.tf/profiles/76561198354076377#!/compare/1546300800/1546387200

Using on the Bombing.

#12

Sold for Aces Pith Helm

https://backpack.tf/profiles/76561198354076377#!/compare/1546387200/1546473600

https://backpack.tf/profiles/76561198240965542#!/compare/1546300800/1546473600

Using on the Helm.

#13

Sold for Stormy Human Cannonball

https://backpack.tf/profiles/76561198240965542#!/compare/1546473600/1546560000

https://backpack.tf/profiles/76561198315727170#!/compare/1546300800/1546560000

Seems rather low, excluding.

#14

Bulk for Vivid Sultan

https://backpack.tf/profiles/76561198315727170#!/compare/1546560000/1546646400

https://backpack.tf/profiles/76561198079328856#!/compare/1546560000/1546646400

Sellers:

https://i.imgur.com/VGu5UwH.png

https://backpack.tf/item/281121937 - 13 keys

https://backpack.tf/item/191823851 - 14 keys

Sales at:

10 (2x)

11

13

Was gonna exclude 10, but given that there are two sales, are pretty close to 11 (which is perfectly valid), and the high-end is based off a marketplace sale, with a 2-month unsold at that same price, it should be fine to include 10 to balance things out.

Going with 10-13.