Resuggestion, thanks to Foamy for the info!

Sale 1:

https://backpack.tf/profiles/76561198046393528#!/compare/1560902400/1560988800

https://backpack.tf/profiles/76561198273492951#!/compare/1560902400/1560988800

Sold for Stormy Peak(42.5)

https://bot.tf/stats/listings/4ZQZV104

B/o of 45 keys

Sale 2:

https://backpack.tf/profiles/76561198133882561#!/compare/1562284800/1562371200

https://backpack.tf/profiles/76561198337734785#!/compare/1562284800/1562371200

Sold for ~35 keys

Sale 3:

https://backpack.tf/profiles/76561198337734785#!/compare/1563926400/1564012800

https://backpack.tf/profiles/76561198047620432#!/compare/1563580800/1564012800

Sold for 39 keys

Sale 4:

https://backpack.tf/profiles/76561198003231859#!/compare/1566518400/1567296000

https://backpack.tf/profiles/76561198342161127#!/compare/1567209600/1567296000

Bulk

Sale 5:

https://backpack.tf/profiles/76561197964171516#!/compare/1563840000/1563926400

https://backpack.tf/profiles/76561198196763853#!/compare/1563840000/1563926400

Sold for Burning Cage

use there

Sale 6:

https://backpack.tf/profiles/76561198196763853#!/compare/1563926400/1564012800

https://backpack.tf/profiles/76561198080179568#!/compare/1563926400/1564012800

Sold for ~34 keys

Sale 7:

https://marketplace.tf/items/tf2/671;5;u110

$79.99 / $1.81 = 44.19 keys <== https://backpack.tf/item/5188858563 | https://bot.tf/stats/listings/Y5RRJ0X7 B/O of 42 keys, capping

Total sales @:

34, 35, 39, 42, 42.5 keys

Sellers at 41, 42, keys.

41 is new, been dropping recently from 45.

Foamy's Part:

New sales:

https://backpack.tf/profiles/76561198838788284#!/compare/1571875200/1571961600 40

https://backpack.tf/profiles/76561198139730916#!/compare/1571529600/1571616000 spelled garbo

https://backpack.tf/profiles/76561198342781596#!/compare/1571356800/1571529600 beams tower

Given that 34 qsed and 35 presumably sold to a buyer I suppose Id prefer a conservative 39-42 here