Sale 1:

https://backpack.tf/profiles/76561198219836673#!/compare/1587513600/1587859200

https://backpack.tf/profiles/76561198850274253#!/compare/1587427200/1587513600

QS

Sale 2:

https://backpack.tf/profiles/76561198850274253#!/compare/1587772800/1587859200

https://backpack.tf/profiles/76561198098005578#!/compare/1587686400/1587859200

Keys

Sale 3:

https://backpack.tf/profiles/76561198098005578#!/compare/1587859200/1588118400

https://backpack.tf/profiles/76561198200803957#!/compare/1588032000/1588118400

Sold for ~8.5 keys

Sale 4:

https://backpack.tf/profiles/76561198200803957#!/compare/1588118400/1588204800

https://backpack.tf/profiles/76561198134215441#!/compare/1588204800/1588204800

https://backpack.tf/profiles/76561198011827547#!/compare/1588118400/1588204800

Untrace

sale 5:

https://backpack.tf/profiles/76561198337734785#!/compare/1581638400/1581724800

https://backpack.tf/profiles/76561198994857134#!/compare/1581638400/1581724800

Keys

Sale 6:

https://backpack.tf/profiles/76561198994857134#!/compare/1581984000/1582070400

https://backpack.tf/profiles/76561198173506101#!/compare/1581984000/1582070400

Bulk

sale 7:

https://backpack.tf/profiles/76561198173506101#!/compare/1582416000/1582502400

https://backpack.tf/profiles/76561198140395967#!/compare/1580860800/1582502400

Sold for 11 keys

Sale 8:

https://backpack.tf/profiles/76561198140395967#!/compare/1583107200/1583366400

https://backpack.tf/profiles/76561198055224435#!/compare/1583193600/1583280000

Bulk

sale 9:

https://backpack.tf/profiles/76561198055224435#!/compare/1583366400/1583452800

https://backpack.tf/profiles/76561199000645463#!/compare/1583452800/1583539200

Sold for DP Tavish

Tavish Mini:

https://backpack.tf/suggestion/5ead778cbda1a50a08030722

Suggestion for 8.75 keys

Sale 10:

https://backpack.tf/profiles/76561199000645463#!/compare/1583539200/1583712000

https://backpack.tf/profiles/76561198119581356#!/compare/1583625600/1583712000

Sold for flies Spartan

use there

Sale 11:

https://backpack.tf/profiles/76561198119581356#!/compare/1583798400/1583884800

https://backpack.tf/profiles/76561198082788453#!/compare/1583798400/1583884800

Bulky

sale 12:

https://backpack.tf/profiles/76561198073040123#!/compare/1587600000/1587686400

https://backpack.tf/profiles/76561198073040123#!/compare/1587600000/1587686400

Bulk

Sale 13:

https://marketplace.tf/items/tf2/323;5;u29

$23 / $1.72 = 13.37 keys

https://backpack.tf/item/4759092831

Total sales @:

8.5, 9, 11, 13 keys

buyers up to ~8.5 keys, one high buyer for ~8.75 keys,

https://i.imgur.com/s7JxlXz.jpg

taking 9 - 13 keys.