I like Steel

Heavy hat

Sellers: - https://gyazo.com/84bc65f7cc8d08d378d7b8ee5dcd92d3

https://backpack.tf/item/8922545877 - 6 days @ 35 keys

https://backpack.tf/item/8815119746 - "young" @ 35 keys, owned and likely listed for a lot longer

https://backpack.tf/item/8137362509 - 17 days @ 35 keys

Sale 1)

https://backpack.tf/profiles/76561198078024659#!/compare/1601942400/1602028800

https://backpack.tf/profiles/76561198137261202#!/compare/1601769600/1602028800 - Works out below buyers, ~25 keys

Sale 2)

https://backpack.tf/profiles/76561198850121720#!/compare/1601683200/1601856000

https://bot.tf/stats/listings/4J5RVNG3 - Possibly sold for 26.5 keys but half the keys on buyers side don't match

Sale 3)

https://backpack.tf/profiles/76561198165629568#!/compare/1600905600/1600992000

https://backpack.tf/profiles/76561198850121720#!/compare/1600905600/1600992000 - Buy order for keys, keys used on pullover

Sale 4)

https://backpack.tf/profiles/76561198165629568#!/compare/1600128000/1600300800

https://backpack.tf/profiles/76561198080179568#!/compare/1600300800/1600387200

https://imgur.com/a/kULW37q - Sold for 30 keys

Sale 5)

https://backpack.tf/profiles/76561198986747837#!/compare/1599782400/1600128000

https://backpack.tf/profiles/76561198100484031#!/compare/1600041600/1600128000 - Untrace

Sale 6)

https://backpack.tf/profiles/76561198012392876#!/compare/1597708800/1600473600

https://backpack.tf/profiles/76561198100484031#!/compare/1599782400/1600041600

https://marketplace.tf/items/tf2/30003;5;u30

$39.95 / $1.85 = 22 keys

https://backpack.tf/item/8815119746 - looks like alt transfers/tradebacks

Sale 7)

https://backpack.tf/profiles/76561198082319502#!/compare/1600732800/1600819200

https://backpack.tf/profiles/76561198074285378#!/compare/1600732800/1600819200 - Sold with a Searing Plasma Physician's Protector (16.5) for a Strange Australium Wrench (~49) = 33 keys

Buyout was 35 keys https://bot.tf/stats/listings/4O9Z1P7V

Sale 8)

https://backpack.tf/profiles/76561198289285442#!/compare/1597795200/1597881600

https://backpack.tf/profiles/76561198082319502#!/compare/1597795200/1597881600 - Low, below buyers ~20 keys

Sale 9)

https://backpack.tf/profiles/76561199039080265#!/compare/1597708800/1597795200

https://backpack.tf/profiles/76561198289285442#!/compare/1597708800/1597795200 - Sold for a Smoking Merc's Mohawk (23.5) = 24 keys

Buyout was 31 keys https://bot.tf/stats/listings/Y9QD61OW

Sale 10)

https://backpack.tf/profiles/76561198010303793#!/compare/1597190400/1597276800

https://backpack.tf/profiles/76561199039080265#!/compare/1597190400/1597276800 - Bulk

Sale 11)

https://marketplace.tf/items/tf2/30003;5;u30

$54.17 / $1.85 = 29 keys

Sale 12) Credits to Xergoyf

https://backpack.tf/profiles/76561198039117789#!/compare/1604102400/1604188800 - Sold for 26 keys

Sales:

22, 24, 26, 29, 30 and 33

Calling 22 and 24 low due to buyers

33 was slightly bulky so excluding

Thanks =)