Item 1:

https://backpack.tf/item/12177757628

Sale 1:

https://backpack.tf/profiles/76561199191939719#!/compare/1757721600/1757808000

https://backpack.tf/profiles/76561197972404012#!/compare/1757635200/1757808000

Sold for 40 keys pure (ID 16165450554)

Sale 2:

https://marketplace.tf/items/tf2/31304;5;u264;strange

Sold for $120 on the 1st of Aug

Keys were $1.9 on the 1st

120/1.9

= 63.1

Rounding down to 63

//

Sellers:

BPTF - https://imgur.com/a/3TUaIzi - 1 @ 40 keys, 1 listed on MP as per below

MPTF - https://marketplace.tf/items/tf2/31304;5;u264;strange - 1 @ $120

STN - Not Listed

SCM - https://steamcommunity.com/market/listings/440/Strange%20Unusual%20Horror%20Shawl?filter=Cursed+Forever%21 - None

Sale(s):

40, 63

Considering there is an unsold at 40 keys for 21 keys and there being a sale 40, I am considering 63 too high.

Going with 40 keys flat