Marketplace Sales:

https://marketplace.tf/items/tf2/31162;5;u3009

https://backpack.tf/item/16420397332

$8.95, June 1st

https://marketplace.tf/items/tf2/5021;6 - keys were $1.93

8.95/1.93 = 4.637, rounds to 4.65 keys

Other Sales:

#1

https://backpack.tf/profiles/76561198051287064#!/compare/1777161600/1781481600

https://backpack.tf/profiles/76561198278271153#!/compare/1778112000/1780185600

https://backpack.tf/item/12519689473

Untraceable, bunch of junk matches. Potentially unusualified.

#2

https://backpack.tf/profiles/76561198442693889#!/compare/1776211200/1778284800

https://backpack.tf/profiles/76561199085116273#!/compare/1776470400/1776556800

https://backpack.tf/item/14394302822

Untraceable

https://backpack.tf/item/9549560894 - marketplace

https://backpack.tf/item/9851843885 - marketplace

https://backpack.tf/item/10524944285 - appears scammed/fenced

https://backpack.tf/item/15253979769 - marketplace

https://backpack.tf/item/11832043728 - mannco

Sellers:

https://i.imgur.com/Uak9Q8i.png

https://backpack.tf/item/9539710930 - ~4.95 keys

https://backpack.tf/item/11097336232 - ~4.95 keys

https://backpack.tf/item/10051202522 - ~4.95 keys

https://backpack.tf/item/9539943545 - 5 keys

https://marketplace.tf/items/tf2/31162;5;u3009

https://backpack.tf/item/9690581694 - $8.95 (~4.85 keys, taking keys at $1.84)

https://backpack.tf/item/11657332877 - $8.95

https://backpack.tf/item/15253979769 - $8.95

https://backpack.tf/item/9549560894 - $8.95

https://backpack.tf/item/9851843885 - $8.95

https://backpack.tf/item/10315417307 - $8.95

https://backpack.tf/item/10379762409 - $8.95

https://backpack.tf/item/15093619203 - $8.95

https://backpack.tf/item/12014877294 - $8.95

1 sale at 4.65 keys.

Taking 4.65 flat.