Sales 1-4:

Sold for $90, $88.89, $85 & $69.99 on marketplace.tf

https://marketplace.tf/items/626;5;u68

https://backpack.tf/item/5449586292

http://www.tf2outpost.com/trade/29188383 - B/O of 85 on the $90 sale

http://www.tf2outpost.com/trade/29701172 - B/O of 43 on the $88.89 sale

Other B/O’s were unavailable.

http://manicbot.me/keyprice/?at=2018-06-20 - 90/1.93 = ~46.63

http://manicbot.me/keyprice/?at=2018-07-13 - 88.99/1.97 = ~45.12 (Caps at 43)

http://manicbot.me/keyprice/?at=2018-07-22 - 85/1.95 = ~43.59

http://manicbot.me/keyprice/?at=2018-07-23 - 69.99/1.95 = ~35.89

X = 47

X = 44

X = 43

X = 36

Sellers:

~39.6 keys: (Scrap.tf)

https://i.imgur.com/rix4IF4.png

https://backpack.tf/item/5449586292 - ~1 week

https://backpack.tf/profiles/76561198135388328#!/compare/1534118400/1534204800 - was obtained on the displayed date

Sales at:

36

43

44

47

Scrap.tf selling for less than 40 supports the inclusion of 36.

Going with 36-47.