Sale 1:

Sold for 7 keys

https://backpack.tf/profiles/76561198064428858#!/compare/1706918400/1707177600

https://backpack.tf/profiles/76561198963406131#!/compare/1706313600/1707177600

https://backpack.tf/item/2517867480

= 7 keys

Sale 2:

Sold for 6 keys

https://backpack.tf/profiles/76561198930977975#!/compare/1707436800/1707868800

https://backpack.tf/profiles/76561198390806391#!/compare/1707177600/1707868800

https://backpack.tf/item/1474624096

= 6 keys

Other Sales:

#1

https://backpack.tf/profiles/76561198137062595#!/compare/1704844800/1704931200

https://backpack.tf/profiles/76561198056793885#!/compare/1704844800/1704931200

https://backpack.tf/item/12960135156

Bulk for Burning Elfin

#2

https://backpack.tf/profiles/76561199467915660#!/compare/1705104000/1705190400

https://backpack.tf/profiles/76561199110809353#!/compare/1705017600/1705104000

https://backpack.tf/item/12728218954

Bulk for keys

#3

https://backpack.tf/profiles/76561199110809353#!/compare/1705622400/1705708800

https://backpack.tf/profiles/76561199069442401#!/compare/1705622400/1705881600

https://backpack.tf/item/12728218954

Untraceable

#4

https://backpack.tf/profiles/76561198161101311#!/compare/1707436800/1707868800

https://backpack.tf/profiles/76561198370162415#!/compare/1707782400/1707868800

https://backpack.tf/item/12342504642

Untraceable

#5

https://backpack.tf/profiles/76561198156181847#!/compare/1707609600/1707696000

https://backpack.tf/profiles/76561199161916038#!/compare/1707609600/1707696000

https://backpack.tf/item/3515139323

Untraceable

#6

https://backpack.tf/profiles/76561198106297191#!/compare/1707004800/1707177600

https://backpack.tf/profiles/76561198064428858#!/compare/1706918400/1707177600

https://backpack.tf/item/2517867480

Bulk for Burning Boxcar

#7

https://backpack.tf/profiles/76561198191933566#!/compare/1703116800/1703289600

https://backpack.tf/profiles/76561199564942025#!/compare/1703116800/1703203200

https://backpack.tf/item/1884712504

Untraceable

#8

https://backpack.tf/profiles/76561199564942025#!/compare/1703116800/1703203200

https://backpack.tf/profiles/76561198168578115#!/compare/1703116800/1703203200

https://backpack.tf/item/1884712504

Untraceable. The rest of the history is just gambling.

#9

https://backpack.tf/profiles/76561198198443662#!/compare/1704585600/1705968000

https://backpack.tf/profiles/76561198850121720#!/compare/1704585600/1704672000

https://backpack.tf/item/1818591778

Untraceable, a little bulky.

#10

https://backpack.tf/profiles/76561198850121720#!/compare/1704931200/1705017600

https://backpack.tf/profiles/76561198806149404#!/compare/1704585600/1705276800

https://backpack.tf/item/1818591778

Untraceable

#11

https://backpack.tf/profiles/76561198135388328#!/compare/1700352000/1700438400

https://backpack.tf/profiles/76561198382267048#!/compare/1700265600/1700438400

https://backpack.tf/item/9884118463

Untraceable. Many keys match on the buyer's end, it's likely multiple items were bought from scrap.

https://backpack.tf/item/9649032776 - mannco

https://backpack.tf/item/1477487513 - marketplace

Marketplace Sales:

https://marketplace.tf/items/tf2/1015;5;u3006

$25.99, November 21st & 23rd

$19.99, December 6th

$22.99, December 11th

$25.99, December 30th (2x)

$26, January 18th

https://marketplace.tf/items/tf2/5021;6

Keys were:

$1.71, November 21st

$1.71, November 23rd

$1.74, December 6th

$1.73, December 11th

$1.68, December 30th

$1.69, January 18th

25.99/1.71 = ~15 keys (2x)

19.99/1.74 = ~11 keys

22.99/1.73 = ~13 keys

25.99/1.68 = ~15 keys (2x)

26/1.69 = ~15 keys

Sellers:

https://imgur.com/a/bmsA3UF

https://backpack.tf/item/1474624096 - 8 keys

https://backpack.tf/item/1477487513 - marketplace

https://backpack.tf/item/12728218954 - marketplace

Sales at:

6

7

11 (marketplace)

13 (marketplace)

15 (5x, marketplace)

As frequent as they are, a lot of those marketplace sales are going to be outliers. We have a seller on marketplace for $19.99 right now.

Buyer at 6 keys, excluding 6.

Going to use 11 as the high-end. This sale was the $19.99 marketplace sale. Given the $19.99 seller, it should be fine to exclude the other marketplace sales for higher.

Going with 7-11.