upd. ressugest

1.untrace

https://backpack.tf/profiles/76561198218857377#!/compare/1625702400/1625961600

2.bulk

https://backpack.tf/profiles/76561198053070636#!/compare/1625443200/1625875200

https://backpack.tf/profiles/76561197968968337#!/compare/1625875200/1625961600

3.for spelled items

https://backpack.tf/profiles/76561197968968337#!/compare/1626048000/1626134400

4.7k

https://backpack.tf/profiles/76561198070213843#!/compare/1626048000/1626134400

https://backpack.tf/profiles/76561198081105031#!/compare/1626134400/1626220800

5.untrace

https://backpack.tf/profiles/76561198081105031#!/compare/1626220800/1626825600

6.bulk

https://backpack.tf/profiles/76561198172292857#!/compare/1625702400/1625788800

https://backpack.tf/profiles/76561198057897812#!/compare/1625788800/1625875200

7.untrace

https://backpack.tf/profiles/76561198057897812#!/compare/1627084800/1627171200

8.untrace

https://backpack.tf/profiles/76561198145906659#!/compare/1626912000/1627171200

9.untrace

https://backpack.tf/profiles/76561198182213262#!/compare/1627084800/1627171200

10.8.5 keys

https://marketplace.tf/items/tf2/30911;5;u31 - new sales at $15.44

------------------------------

and some additional data points provided by Xergoyf:

https://backpack.tf/profiles/76561199084784906#!/compare/1624320000/1624406400

7 match, likely 7.5 tho

https://gladiator.tf/listings/6105903140e1e11fed87241e

https://backpack.tf/profiles/76561199102407070#!/compare/1631318400/1631404800

https://gladiator.tf/sales?item=Nuts%20n%27%20Bolts%20Fat%20Man%27s%20Field%20Cap&at=2021-09-17T20:24:58.268Z

Says 7.5, untrace tho

buyer resold on SCM

https://backpack.tf/profiles/76561198062800939#!/compare/1631664000/1631750400

https://steamcommunity.com/market/listings/440/Unusual%20Fat%20Man%27s%20Field%20Cap

Either the $16 or $18 sale, 7 or 8 keys

The 7 or 8 key sale can't be used; we don't know which of the two it is - it should only be used as supportive.

New sales:

https://marketplace.tf/items/tf2/30911;5;u31

$15.44 / $1.84 = 8.39

$17.99 / $1.92 = 9.37 keys - high due to sellers

https://backpack.tf/profiles/76561198419343857#!/compare/1637539200/1637625600

Sold for ~7.5 to a buy order

While there are 2 sales at 7, one is likely 7.5. I think a range of 7.5 - 8.5 could be workable here, even with the buyers up to 7.7.

total: 7.5k-8.5k avg 8k