Yo, it's one of those pure sales I found

Item 1

https://backpack.tf/item/10931258508

Excluding scammer trades

Item 2

https://backpack.tf/item/10915520338

Withdrawn off Mannco and sold to qs.store by the looks of it

Oh it's actually a sale on Mannco

Sale 1

https://mannco.store/item/440-eyes-of-molten-unusual-optic-nerve

https://prnt.sc/lu_VgHkuizGT - $60.99 on Jun 11th

https://prnt.sc/WJECoTvBizof - $1.82 keys at the time

$60.99 / $1.82 = 33.51 keys

And then dumped to qs.store buy order

Item 3

https://backpack.tf/item/10750055149

Sale 2

https://backpack.tf/profiles/76561198133991629#!/compare/1686355200/1686528000

https://backpack.tf/profiles/76561199003541564#!/compare/1686355200/1686441600

37 keys

Sales

34, 37

Current Listings

https://prnt.sc/BdRED9ct4ar1

20 days at 58 keys

2 years at 65 keys

2 buy orders at 34.6 keys

Given qs.store owns 2 and probably paid around buy orders, excluding the mannco sale because rules but it supports the price being at 37 flat.

Running with 37 keys here.