Only history with recent sales: https://backpack.tf/item/8858793335

The hat was bought fron STN then dumped back within a couple of days

Sold for 6 keys 0.22 ref, ~6 keys

https://backpack.tf/profiles/76561198311498888#!/compare/1594080000/1594166400

https://backpack.tf/profiles/76561198101398885#!/compare/1594080000/1594166400

Only 1 key matches on the seller's side, nothing matches on the buyer's, untrace

https://backpack.tf/profiles/76561198101398885#!/compare/1594166400/1594252800

https://backpack.tf/profiles/76561198316469164#!/compare/1594166400/1594252800

1 ref matches in the seller's inventory. Bot.tf indicates that this was sold at 6 keys 1 ref with the date matching the compare, the keys were most likely instantly re-traded

https://backpack.tf/profiles/76561198316469164#!/compare/1594166400/1594252800

https://backpack.tf/profiles/76561198341171690#!/compare/1594166400/1594252800

Bot.tf stats: https://imgur.com/QPz49DO

The item was then moved to a private inventory because the item leaves the seller's inventory without showing who owns it now. Bot.tf shows that it was sold at 6 keys 54 ref with a classifieds snapshot to confirm it. 6 keys 14 ref show added together but the other metal was most likely instantly re-traded

6 keys 54 ref = 7.15 keys, ~7

https://backpack.tf/profiles/76561198341171690#!/compare/1597104000/1597190400

Bot.tf stats: https://imgur.com/QPz49DO

Classifieds snapshot: https://bot.tf/stats/listings/4KVDJG20

Sale on marketplace.tf: https://marketplace.tf/items/tf2/31024;5;u59

(untraceable) August 7 2020: $14 (key=$1.85, 7.57 keys) ~7.5 keys

6 keys is low because of buyers at 6.21-6.22

Going with 7-7.5 keys