Marketplace Sales:

https://marketplace.tf/items/tf2/30327;5;u57

$13.01, April 5th

$17.99, April 12th

$13.99, April 12th

$17.99, May 21st

No snapshots available

https://backpack.tf/item/7956756138 - One of the April 12th sales

Couldn’t find any other histories.

http://manic.tf/keyprice?at=2020-04-05&price=13.01 - $13.01 / $1.69 = 7.70 keys

http://manic.tf/keyprice?at=2020-04-12&price=17.99 - $17.99 / $1.71 = 10.52 keys

http://manic.tf/keyprice?at=2020-04-12&price=13.99 - $13.99 / $1.71 = 8.18 keys

http://manic.tf/keyprice?at=2020-05-21&price=17.99 - $17.99 / $1.88 = 9.57 keys

After rounding, we have:

10.5 keys

Other Sales:

https://backpack.tf/item/7957527281 (#1 & #2)

https://backpack.tf/item/7956898959 (#3 & #4)

https://backpack.tf/item/7956756138 - marketplace/gambled

#1

Bulk for Wicked Wood Melted Mop

https://backpack.tf/profiles/76561198083936694#!/compare/1493856000/1585094400

https://backpack.tf/profiles/76561198077875601#!/compare/1585094400/1585526400

#2

Sold for Steaming Napoleon Complex

https://backpack.tf/profiles/76561198077875601#!/compare/1587600000/1587772800

https://backpack.tf/profiles/76561198840183868#!/compare/1587081600/1588636800

Can be used on the Complex.

#3

Untraceable

https://backpack.tf/profiles/76561198256852059#!/compare/1583193600/1583366400

https://backpack.tf/profiles/76561198850274253#!/compare/1583280000/1583366400

#4

Untraceable

https://backpack.tf/profiles/76561198850274253#!/compare/1587513600/1587600000

https://backpack.tf/profiles/76561198211878508#!/compare/1587513600/1587600000

Gambled afterwards.

Sellers:

https://marketplace.tf/items/tf2/30327;5;u57

https://backpack.tf/item/7955691788

Sales at:

7.5

8

9.5

10.5

Average price of sales is under 10 keys, so we round to the nearest 0.5 keys.

Taking 7.5-10.5.