Sale 1:

https://backpack.tf/profiles/76561198050518375#!/compare/1566691200/1566777600

https://backpack.tf/profiles/76561198446766790#!/compare/1566777600/1566864000

Sold for ~6 keys

sale 2:

https://backpack.tf/profiles/76561198446766790#!/compare/1567123200/1567555200

https://backpack.tf/profiles/76561198034268412#!/compare/1567468800/1567555200

Untrace

sale 3:

https://backpack.tf/profiles/76561198034268412#!/compare/1567900800/1567987200

https://backpack.tf/profiles/76561198121808984#!/compare/1567987200/1568160000\

Bulk

sale 4:

https://backpack.tf/profiles/76561198036144976#!/compare/1566777600/1566864000

https://backpack.tf/profiles/76561198323565601#!/compare/1566777600/1566864000

Sold for 6 keys (QS)

Sale 5:

https://backpack.tf/profiles/76561198342161127#!/compare/1567123200/1567209600

https://backpack.tf/profiles/76561198024867201#!/compare/1567123200/1567209600

QS(?)

Sale 6:

https://backpack.tf/profiles/76561198024867201#!/compare/1567555200/1567641600

https://backpack.tf/profiles/76561198149736407#!/compare/1567382400/1567641600

Untrace

sale 7:

https://backpack.tf/profiles/76561198149736407#!/compare/1570320000/1573776000

https://backpack.tf/profiles/76561198025034874#!/compare/1570838400/1570924800

SCM

Sale 8:

https://backpack.tf/profiles/76561198122281828#!/compare/1573689600/1573776000

https://backpack.tf/profiles/76561198985821194#!/compare/1573689600/1573776000

Transfer

Sale 9:

https://backpack.tf/profiles/76561198087806765#!/compare/1566604800/1566864000

https://backpack.tf/profiles/76561198018497391#!/compare/1566518400/1566604800

Untrace

sale 10:

https://backpack.tf/profiles/76561198018497391#!/compare/1566950400/1567209600

https://backpack.tf/profiles/76561198841912826#!/compare/1567123200/1567209600

Sold with ~1.5 keys in sweets for KaW Bolted

use there

Sale 11:

https://backpack.tf/profiles/76561198841912826#!/compare/1567209600/1567296000

https://backpack.tf/profiles/76561198338238598#!/compare/1565654400/1567296000

Sold for ~6.5 keys

Sale 12:

https://backpack.tf/profiles/76561198932894420#!/compare/1566691200/1566691200

https://backpack.tf/profiles/76561197995376241#!/compare/1569456000/1569801600

Untrace

Sale 13:

https://backpack.tf/profiles/76561197995376241#!/compare/1567814400/1567900800

https://backpack.tf/profiles/76561198979117478#!/compare/1567900800/1568592000

Untrace

sale 14:

https://backpack.tf/profiles/76561198979117478#!/compare/1568592000/1569369600

https://backpack.tf/profiles/76561198377165880#!/compare/1568592000/1568764800

Bulk

sale 15:

https://marketplace.tf/items/tf2/30039;5;u59

$9 / $1.82 = 4.95 keys

$14.85 / $1.82 = 8.16 keys <---- https://backpack.tf/item/2094022916

$14.85 / $1.83 = 8.11 keys

Total sales @:

4.95, 6, 6.5, 8.11, 8.16 keys

buyers up to ~6 keys,

sellers for ~7 keys,

taking 6.5 - 8 keys, conserving close to sellers.