Item 1: https://backpack.tf/item/10828875293

Sale 1: 338k, 23.11r

https://backpack.tf/profiles/76561198192888090#!/compare/1759881600/1761350400

https://backpack.tf/profiles/76561199766431015#!/compare/1760054400/1761350400

Sale 2: 356k, seems to sell same-day to Manatee

https://backpack.tf/profiles/76561199766431015#!/compare/1760054400/1761350400

https://backpack.tf/profiles/76561199745887780#!/compare/1761091200/1761436800

Sale 3: Untrace, seen leaving MrManatee's BP but not picked up in Systemic's until 11/12 > 11/13 with unrelated outgoing

https://backpack.tf/profiles/76561199745887780#!/compare/1762300800/1762905600

https://backpack.tf/profiles/76561198965718394#!/compare/1762214400/1762905600

https://backpack.tf/profiles/76561198965718394#!/compare/1762905600/1762992000

Sale 4: Sold alongside a Roboactive FR-0 for a Burning Flames Prince Tavish's Crown

https://backpack.tf/profiles/76561198063640894#!/compare/1762819200/1763078400

https://backpack.tf/profiles/76561198965718394#!/compare/1762992000/1763078400

Roboactive FR-0 micro:

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Item 1: https://backpack.tf/item/10413055354

Sale 1: Bot dump

https://backpack.tf/profiles/76561198045708542#!/compare/1761177600/1761264000

https://backpack.tf/profiles/76561198378207723#!/compare/1761177600/1761264000

Sale 2: Untrace

https://backpack.tf/profiles/76561198335636056#!/compare/1761350400/1761436800

https://backpack.tf/profiles/76561198145331385#!/compare/1761350400/1761436800

Sale 3: Untrace

https://backpack.tf/profiles/76561198145331385#!/compare/1761868800/1761955200

https://backpack.tf/profiles/76561198044301165#!/compare/1761868800/1762041600

Sale 4: Untrace

https://backpack.tf/profiles/76561198044301165#!/compare/1762041600/1762128000

https://backpack.tf/profiles/76561198140803713#!/compare/1762041600/1762128000

Sale 5: Bulk

https://backpack.tf/profiles/76561198140803713#!/compare/1762560000/1762992000

https://backpack.tf/profiles/76561198965718394#!/compare/1762646400/1762905600

Sale 6: Bulk

https://backpack.tf/profiles/76561198063640894#!/compare/1762819200/1763078400

https://backpack.tf/profiles/76561198965718394#!/compare/1762905600/1762992000

Sale 7: 50k~, but this is below buyers and the keys share history w/ Kush but aren't seen in inv anyways, could be incomplete

https://backpack.tf/profiles/76561198063640894#!/compare/1767744000/1768608000

https://backpack.tf/profiles/76561198987799759#!/compare/1768089600/1768608000

Will micro this at buyers of 85k: https://imgur.com/a/irfTxBy

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Burning Flames Prince Tavish's Crown open suggestion can be found here: https://backpack.tf/suggestion/6970ff08f65103e2a6050aec

Taking 471.5k

Total for Sale 4: 471.5k - 85k = 386.5k

Sale 5: Sold alongside a Spectral Spectrum spelled Killer Exclusive and one key for an Anti-Freeze Glengarry Bonnet, a Roboactive Plug-In Prospector, and a Cold Cosmos Detective

https://backpack.tf/profiles/76561199098366624#!/compare/1765065600/1765152000

https://backpack.tf/profiles/76561198063640894#!/compare/1765065600/1765152000

Couldn't find any in-date movements for the Spectral Spectrum Killer Exclusive, both movements on this item are bulk and it's unsold, taking buyers at 4.1k:

https://imgur.com/a/xQOBtiJ

Anti-Freeze Glengarry Bonnet micro:

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Item 1: https://backpack.tf/item/1668923929

Sale 1: Bulk

https://backpack.tf/profiles/76561199098366624#!/compare/1765065600/1765152000

https://backpack.tf/profiles/76561198063640894#!/compare/1765065600/1765152000

Sale 2: Bulk

https://backpack.tf/profiles/76561198063640894#!/compare/1765670400/1765756800

https://backpack.tf/profiles/76561198018561983#!/compare/1765584000/1765756800

Presumably Frog dumps to Veleno, who then dumps to Scrapyard bot, no telling any values on these movements though.

https://backpack.tf/profiles/76561198453530349#!/compare/1765670400/1765756800

Sale 3: Untrace, could be the 163k but would be below buyers, nothing matches and it goes direct to MP

Will micro this at buyers of 196.58k: https://imgur.com/a/UQ54Luj

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Roboactive Plug-In Prospector micro:

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Item 1: https://backpack.tf/item/2089831510

Sale 1: Untrace

https://backpack.tf/profiles/76561198312743572#!/compare/1764201600/1764288000

https://backpack.tf/profiles/76561198058356352#!/compare/1764201600/1764288000

Sale 2: Bulk

https://backpack.tf/profiles/76561198058356352#!/compare/1764979200/1765065600

https://backpack.tf/profiles/76561199098366624#!/compare/1764979200/1765065600

Sale 3: Bulk

https://backpack.tf/profiles/76561199098366624#!/compare/1765065600/1765152000

https://backpack.tf/profiles/76561198063640894#!/compare/1765065600/1765152000

Will micro this at buyers of 116.56k: https://imgur.com/a/wutZo1o

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Cold Cosmos Detective micro:

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Item 1: https://backpack.tf/item/12014844993

Sale 1: Bot dump

https://backpack.tf/profiles/76561198047117990#!/compare/1763683200/1764028800

https://backpack.tf/profiles/76561199697483558#!/compare/1763683200/1764028800

Item 2: https://backpack.tf/item/12013301440

Sale 1: Bulk

https://backpack.tf/profiles/76561198050122621#!/compare/1765411200/1765497600

https://backpack.tf/profiles/76561198261483133#!/compare/1765411200/1765497600

Item 3: https://backpack.tf/item/11946269141

Sale 1: Bulk

https://backpack.tf/profiles/76561198058356352#!/compare/1764979200/1765065600

https://backpack.tf/profiles/76561199098366624#!/compare/1764979200/1765065600

Sale 2: Bulk

https://backpack.tf/profiles/76561199098366624#!/compare/1764979200/1765065600

https://backpack.tf/profiles/76561198063640894#!/compare/1764979200/1765065600

Will micro this at buyers of 102.81k: https://imgur.com/a/6ozwz19

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Total for Sale 5: 102.81k + 116.56k + 196.58k - 4.1k = 411.85k

Sale 6: Sold alongside a Spectral Spectrum spelled Killer Exclusive, a Hazardous Gas Taunt: Mourning Mercs, and a Professional Killstreak Festive Huntsman, for a Burning Flames Rotation Sensation and a Cosmic Constellations Shellmet

https://backpack.tf/profiles/76561198220098345#!/compare/1765152000/1765238400

https://backpack.tf/profiles/76561199098366624#!/compare/1765152000/1765238400

Couldn't find any in-date movements for the Spectral Spectrum Killer Exclusive, both movements on this item are bulk and it's unsold, taking buyers at 4.1k:

https://imgur.com/a/xQOBtiJ

Hazardous Gas Mourning Mercs open suggestion can be found here: https://backpack.tf/suggestion/6970e58a89d3ea81da0ea323

Taking 18k

No special kit on the Huntsman, taking generic buyers for Pro KS: https://imgur.com/a/qBaNMaa

Taking bot buyers for reliability (and no change in rounding) at 5.41k

Burning Flames Rotation Sensation open suggestion can be found here: https://backpack.tf/suggestion/6970ef38a2d8845a550cecf1

Taking 420k

Tried mini-ing the Shellmet, movement immediately after this is untrace, then it's dumped to bots for 159k, then bulked twice, so would have to micro this at buyers here: https://imgur.com/a/stLxwXd

159.28k

Total for Sale 6: 420 + 159.28 - 5.41 - 18 - 4.1 = 551.77

Sales at 338k~, 356k, 386.5k, 411.85k, 551.77k. Buyers at 309k don't exclude anything, but the speed of the sales at 338/356k mean they should be excluded as quicksells. 550k sale is technically an outlier here, but this seems to be more representative of item overpay as a whole. Would leave that judgment up to mods if it should be removed or not though.

Taking 386.5k rounded to 390k for the low end, and 551.77k rounded to 550k for the high end.