Credits Rouzen Zaker

https://backpack.tf/item/1207405453

Sale 1:

https://backpack.tf/profiles/76561198002974658#!/compare/1669507200/1669593600

https://backpack.tf/profiles/76561197993708178#!/compare/1669075200/1669593600

https://gladiator.tf/time-machine?item=Cloudy%20Moon%20A%20Rather%20Festive%20Tree&at=2022-11-28T01:51:23.000Z

https://imgur.com/a/VAs3lEX

Cosmos Undercover Brolly (39)

https://gladiator.tf/sales?item=Cold%20Cosmos%20Undercover%20Brolly&at=2022-11-27T22:46:28.154Z

https://gladiator.tf/time-machine?item=Cold+Cosmos+Undercover+Brolly&at=2022-11-27T01%3A12%3A00.000Z

Sales at 37 and 40. Sales at 46 and 53 looked a bit high. 37 - 40, ~39 keys.

https://backpack.tf/suggestion/6385462a993fc459ca020411

~39 keys

+

Fifth Dimension Universal Translator (204)

+

Nebula A Head Full of Hot Air (132)

https://gladiator.tf/sales?item=Nebula%20A%20Head%20Full%20of%20Hot%20Air&at=2022-11-27T22:47:37.976Z

https://gladiator.tf/time-machine?item=Nebula%20A%20Head%20Full%20of%20Hot%20Air&at=2022-11-27T19:58:20.000Z

Sales at 125 - 138, was listed at 137, taking ~132 keys.

+

25 keys

=

39 + 204 + 132 + 25

=

400 keys

Sale 2:

https://backpack.tf/profiles/76561198102211716#!/compare/1670630400/1670803200

https://backpack.tf/profiles/76561198055622215#!/compare/1670716800/1670803200

https://gladiator.tf/time-machine?item=Cloudy%20Moon%20A%20Rather%20Festive%20Tree&at=2022-12-10T17:29:01.000Z

Tree

+

Chromatica Sophisticated Smoker (150)

https://backpack.tf/suggestion/638f68870a6eddbdf00539ac

+

Cloud 9 Infernal Impaler (16)

https://gladiator.tf/sales?item=Cloud%209%20Infernal%20Impaler&at=2022-11-28T22:40:38.590Z - ~17 keys

https://gladiator.tf/sales?item=Cloud%209%20Infernal%20Impaler&at=2022-12-28T22:40:38.590Z - ~15 keys

15 - 17, ~16 keys.

+

Exorcism Strange Professional Killstreak Hitman's Heatmaker (15)

https://gladiator.tf/time-machine?item=Strange%20Professional%20Killstreak%20Hitman%27s%20Heatmaker&at=2022-12-28T22:58:05.022Z

Spelled buyers at ~15 keys.

for

Terror-Watt Exquisite Rack (440)

https://backpack.tf/profiles/76561198067741299#!/compare/1666742400/1666828800

https://gladiator.tf/time-machine?item=Terror-Watt%20Exquisite%20Rack&at=2022-10-27T03:44:14.000Z

Looks like ~395 keys

https://backpack.tf/profiles/76561198102211716#!/compare/1669420800/1669507200

https://backpack.tf/profiles/76561198055622215#!/compare/1669420800/1669593600

https://gladiator.tf/time-machine?item=Terror-Watt%20Exquisite%20Rack&at=2022-11-27T11:56:30.000Z

Nebula Universal Translator (465, https://backpack.tf/suggestion/63a4be8e30921a10700148b1) + 19 keys = 484 keys

395 - 484, ~440 keys.

+

Anti-Freeze Caribbean Conqueror (134)

https://backpack.tf/profiles/76561198068732040#!/compare/1666742400/1666828800

https://backpack.tf/profiles/76561198055622215#!/compare/1666742400/1666828800

https://gladiator.tf/time-machine?item=Anti-Freeze+Caribbean+Conqueror&at=2022-10-26T23%3A14%3A00.000Z

https://gladiator.tf/time-machine?item=Frostbite%20Helmet%20Without%20a%20Home&at=2022-10-27T02:01:25.000Z

Seems to have sold alongside the Frostbite Helmet Without a Home for 258 keys, bulk

https://gladiator.tf/time-machine?item=Anti-Freeze%20Caribbean%20Conqueror&at=2022-12-11T00:52:47.000Z

Buyers at the time up to ~134 keys.

440 + 134 - 150 - 16 - 15 = 393 keys

I personally think Sale 2 is a bit on the bulkier side, not to mention the Anti-Freeze Caribbean Conqueror is probably being a little undervalued. 393 is also pretty close to 400, to the point that I think I'd prefer to just scrap the range and call this 400 flat. So taking that.