Sale 1:

Sold for Max's (21.5) + Aus Spec. KS Knife (~19) + ~7 keys in items

Seller: https://backpack.tf/profiles/76561198263653213#!/compare/1599177600/1599264000

Buyer: https://backpack.tf/profiles/76561198109901645#!/compare/1599264000/1599350400

https://backpack.tf/item/8987348584

<https://bot.tf/stats/listings/MNREZP85 - B/O of 45

45 keys (Capped by B/O)

Sale 2:

Sold for Beams Rubber Glove (Suggestion at 35) + 10 keys

Seller: https://backpack.tf/profiles/76561198429062799#!/compare/1597017600/1597104000

Buyer: https://backpack.tf/profiles/76561198026726254#!/compare/1597017600/1597104000

https://backpack.tf/item/7957440718

No B/O

45 keys

Sale 3:

Sold for Dead Presidents Kiss King (11) + Haunted Ghosts Human Cannonball (Suggestion at + 23.5) ~7 keys in pure/items

Seller: https://backpack.tf/profiles/76561198066686957#!/compare/1591747200/1591833600

Buyer: https://backpack.tf/profiles/76561198120798830#!/compare/1591660800/1591747200

https://backpack.tf/item/7693234664

No B/O.

Gambled afterwards.

42 keys

Sale 4:

Sold for 37 keys

Seller: https://backpack.tf/profiles/76561198010332638#!/compare/1599004800/1599091200

Buyer: https://backpack.tf/profiles/76561198263653213#!/compare/1599004800/1599091200

https://backpack.tf/item/8987348584

37 keys

Sale 5:

Sold for 37 keys

Seller: https://backpack.tf/profiles/76561198875560035#!/compare/1597968000/1598140800

Buyer: https://backpack.tf/profiles/76561198136257665#!/compare/1597795200/1597968000

https://backpack.tf/item/7956116416

37 keys

Sale 6:

Sold for 33 keys + ~1 key in metal

Seller: https://backpack.tf/profiles/76561198267189538#!/compare/1596758400/1596844800

Buyer: https://backpack.tf/profiles/76561198357093059#!/compare/1596758400/1596844800

https://backpack.tf/item/7955984339

https://i.imgur.com/d2gTmOf.png - bot.tf confirms.

34 keys

Sale 7:

Sold for 31 keys + some metal

Seller: https://backpack.tf/profiles/76561199010987801#!/compare/1592524800/1592611200

Buyer: https://backpack.tf/profiles/76561198357093059#!/compare/1592524800/1592956800

https://backpack.tf/item/7693234664

https://i.imgur.com/d2gTmOf.png - bot.tf confirms

31 keys

Sale 8:

Sold for Clairvoyance Tank Top + Peace Sign Universal Translator (12) + Max's Head (~17 at the time)

Seller: https://backpack.tf/profiles/76561197964171516#!/compare/1591488000/1591574400

Buyer: https://backpack.tf/profiles/76561198151698272#!/compare/1562630400/1591574400

https://backpack.tf/item/7955984339

https://bot.tf/stats/listings/MNRJXEJJ - Max's Being sold for ~17 keys during this time

https://bot.tf/stats/listings/4WX02D1N - B/O of 40

With buy orders at almost 9 keys on the Tank Top, this'll be at least 38, and it can't exceed 40 due to the B/O, so no mini needed here.

Marketplace Sales:

https://marketplace.tf/items/tf2/30362;5;u58;strange

$159.99, August 18th

https://marketplace.tf/items/tf2/30362;5;u58

$75.83, June 11th

$46.41, July 13th

$82.50, July 17th

$75.95, August 3rd

July 13th went to a buy order, excluding.

https://backpack.tf/item/3956630721 - August 18th is obviously way too high, excluding.

https://backpack.tf/item/7956116416 - June 11th, went to a scammer, excluding.

https://backpack.tf/item/7955984339 - August 3rd, no B/O

Couldn't find the other histories.

http://manic.tf/keyprice?at=2020-06-11&price=75.83 - $75.83 / $2.03 = 37.35 keys

http://manic.tf/keyprice?at=2020-07-17&price=82.5 - $82.5 / $1.97 = 41.88 keys

http://manic.tf/keyprice?at=2020-08-03&price=75.95 - $75.95 / $1.89 = 40.19 keys

After rounding, we have:

42 keys

Other Sales:

https://backpack.tf/item/9027634732 (#1)

https://backpack.tf/item/8987348584 (#2)

https://backpack.tf/item/7957440718 (#3-5)

https://backpack.tf/item/7956116416 (#6 & #7)

https://backpack.tf/item/7693234664 (#8)

https://backpack.tf/item/4079046480 (#9 & #10)

https://backpack.tf/item/8755302272 - marketplace

#1

SCM

https://backpack.tf/profiles/76561197963500354#!/compare/1596931200/1597017600

https://backpack.tf/profiles/76561198023437742#!/compare/1547510400/1597190400

#2

Untraceable

https://backpack.tf/profiles/76561198823083394 - won't update

https://backpack.tf/profiles/76561198010332638#!/compare/1598832000/1599004800

Most likely sold for 34 keys + some metal

#3

Untraceable

https://backpack.tf/profiles/76561198357093059#!/compare/1594598400/1596153600

https://backpack.tf/profiles/76561198410196580#!/compare/1596153600/1596240000

https://i.imgur.com/NAXo1sz.png - labelled as 45 keys

#4

Sold for unusual scattergun

https://backpack.tf/profiles/76561198410196580#!/compare/1597017600/1597104000

https://backpack.tf/profiles/76561198429062799#!/compare/1596931200/1597017600

Can be used to price the scatter.

#5

Sold for Stormy Storm Ten Gallon + Orbiting Fire Bottle Cap + Disco Beat Down Condor Cap

https://backpack.tf/profiles/76561198026726254#!/compare/1597017600/1597104000

https://backpack.tf/profiles/76561198144071643#!/compare/1597104000/1597190400

No B/O, gonna be way too high without one, excluding.

#6

Untraceable

https://backpack.tf/profiles/76561198966586069#!/compare/1592006400/1592092800

https://backpack.tf/profiles/76561198337734785#!/compare/1591920000/1592006400

#7

Untraceable

https://backpack.tf/profiles/76561198337734785#!/compare/1592697600/1592784000

https://backpack.tf/profiles/76561198875560035#!/compare/1593907200/1594252800

#8

Untraceable

https://backpack.tf/profiles/76561198337734785#!/compare/1591660800/1591747200

https://backpack.tf/profiles/76561198066686957#!/compare/1591660800/1591747200

#9

Untraceable, possible bulk

https://backpack.tf/profiles/76561198021228339#!/compare/1592870400/1592956800

https://backpack.tf/profiles/76561198841365001#!/compare/1592870400/1592956800

#10

Untraceable

https://backpack.tf/profiles/76561198928087066#!/compare/1589068800/1594512000

https://backpack.tf/profiles/76561198041124704#!/compare/1594512000/1594598400

https://i.imgur.com/d2gTmOf.png - labelled as 33 keys

Beams Rubber:

https://backpack.tf/suggestion/5f54c6fe1b306464df1f95ec

Haunted Cannonball:

https://backpack.tf/suggestion/5f54c1458e4e1a5daf14dfe8

Sellers:

https://i.imgur.com/YGdMmy9.png

https://backpack.tf/item/8987348584 - 40 keys

https://backpack.tf/item/7956116416 - 50 keys

https://backpack.tf/item/7955984339 - 50 keys

https://backpack.tf/item/7956746980 - 58 keys

Sales at:

31

34

37 (3x)

40

42 (2x)

45 (2x)

And another at 38-40.

Buyers up to 36, excluding 31 and 34.

Taking 37-45.