Marketplace Sales:

https://marketplace.tf/items/tf2/31458;5;u335

$29.99, June 8th & July 24th

https://backpack.tf/item/14789473274 - most likely June 8th, couldn’t confirm the other

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

$1.93, June 8th

$1.94, July 24th

29.99/1.93 = 15.539, rounds to 16 keys

29.99/1.94 = 15.459, rounds to 15 keys

Other Sales:

#1

https://backpack.tf/profiles/76561199870690660#!/compare/1752451200/1752537600

https://backpack.tf/profiles/76561198115175633#!/compare/1748908800/1754179200

https://backpack.tf/item/14789473274

Untraceable

#2

https://backpack.tf/profiles/76561198228652840#!/compare/1752883200/1753228800

https://backpack.tf/profiles/76561199047995411#!/compare/1754438400/1754524800

https://backpack.tf/item/14746950224

Untraceable

#3

https://backpack.tf/profiles/76561198349848918#!/compare/1753056000/1753142400

https://backpack.tf/profiles/76561198880427555#!/compare/1752278400/1753401600

https://backpack.tf/item/14732832383

Untraceable, 20 ref matches

#4

https://backpack.tf/profiles/76561199059698603#!/compare/1749859200/1749945600

https://backpack.tf/profiles/76561198005590158#!/compare/1749340800/1749945600

https://backpack.tf/item/14691642601

Sold for a bunch of junk, not an ideal sale to be using here

https://backpack.tf/item/14790281055 - gambled

https://backpack.tf/item/14687209901 - mannco

Sellers:

https://i.imgur.com/KV8dW89.png

https://backpack.tf/item/14790281055 - 18 keys

https://backpack.tf/item/14692743262 - ~19.1 keys

https://backpack.tf/item/14894173784 - 25 keys

Sales at:

15

16

Taking 15-16 keys.