I like trees, especially energetic ones. Resuggestion, and many thanks to aj.

Current Listings

https://prnt.sc/10ar53v

Duped, unsold at 46 keys for 24 days

Item 1

https://backpack.tf/item/1116541313

Sale 1

https://backpack.tf/profiles/76561198139370347#!/compare/1608508800/1608595200

https://backpack.tf/profiles/76561198092048287#!/compare/1608422400/1608768000

Sold for 43 keys 45 ref

https://gladiator.tf/listings/5fe13ff58999edc953e1af93

BO was 44 keys 60 ref, so taking 44 here.

Sale 2

https://backpack.tf/profiles/76561198092048287#!/compare/1608768000/1609372800

https://backpack.tf/profiles/76561198841279602#!/compare/1608681600/1608768000

Untraceable

Sale 3

https://backpack.tf/profiles/76561198841279602#!/compare/1608854400/1608940800

https://backpack.tf/profiles/76561198084860572#!/compare/1608940800/1609200000

Excluding this one, probably something was missing or untraceable

Item 2

https://backpack.tf/item/907974643

Sale 4

https://backpack.tf/profiles/76561198031341129#!/compare/1606780800/1607040000

https://backpack.tf/profiles/76561198254279766#!/compare/1606953600/1607040000

Sold for Haunted Ghosts Winter Woodsman (55.5, 8-month-old price, mini below) + 2 keys

Sale 5

https://backpack.tf/profiles/76561198254279766#!/compare/1607040000/1607212800

https://backpack.tf/profiles/76561198065504881#!/compare/1607212800/1607299200

41 keys

Sale 6

https://backpack.tf/profiles/76561198065504881#!/compare/1609804800/1609891200

https://backpack.tf/profiles/76561198255824681#!/compare/1609804800/1609891200

40 keys

Sale 7

https://backpack.tf/profiles/76561198255824681#!/compare/1609804800/1609891200

https://backpack.tf/profiles/76561198107367025#!/compare/1609804800/1609891200

Sold for Vivid Plasma A Modest Pile of Hat (33.5, 8-month-old price, mini below) + 7 keys

Sale 8

https://backpack.tf/profiles/76561198107367025#!/compare/1609891200/1609977600

https://backpack.tf/profiles/76561198232041512#!/compare/1609891200/1609977600

Sold with 15 keys for a Stormy Storm Hong Kong Cone (58.5, 8-month-old price, mini below)

Sale 9

On and off bot, excluding

Sale 10

https://backpack.tf/profiles/76561198232041512#!/compare/1613779200/1613865600

https://backpack.tf/profiles/76561198888086377#!/compare/1613692800/1613779200

42 keys 36.55 ref, taking 43 here

Sale 11

https://marketplace.tf/items/tf2/341;5;u10

Dec 12th - $85 / $1.89 = 44.97 keys

Jan 1st - $89.95 / $2.13 = 42.23 keys

Feb 27th - $99.99 / $2.14 = 46.72 keys

Item 3

https://backpack.tf/item/531645554

Sale 12

https://backpack.tf/profiles/76561198153500795#!/compare/1614470400/1614556800

https://backpack.tf/profiles/76561197961309499#!/compare/1614470400/1614556800

Sold with 33 pure for a DBD Killer Exclusive (72.5, in date, mini below)

https://gladiator.tf/listings/603ce569424976b37b0a9037

Seller BO was 48

Mini on HG Winter Woodsman

Trend over the past 2 weeks:

https://gladiator.tf/listings/6028c54cdfcfa715281c8073

https://gladiator.tf/listings/602e2b543707f9c25134c8f9

https://gladiator.tf/listings/6035d7b225a3119905132135

https://gladiator.tf/listings/603aae05147081fa02916a1b

https://gladiator.tf/listings/603caf86740824af9729fbe6

https://gladiator.tf/listings/603d14aaac45ad2e7e450603

https://gladiator.tf/listings/6038e23e3ccaa898194d42ef

Many of the listings are at 47-48, 55 unsold for 6 months, so taking 47

47-2=45

Mini on VP A Modest Pile of Hat

https://gladiator.tf/listings/603d7b3f085d26440ea93439

https://gladiator.tf/listings/603b82fc5a943e985d587831

https://gladiator.tf/listings/603874a6bf970783b0c4f71f

https://gladiator.tf/listings/603567c258839e16b907c1da

https://gladiator.tf/listings/603075f9cd1d8630dd67637b

https://gladiator.tf/listings/602e7ec702601ae820bc1019

https://gladiator.tf/listings/602bb6c7a68595a750e74814

https://gladiator.tf/listings/6024537c8b2d349933046104

Only 1 sale at 40. 43 unsold for 16 days, 48 and 52 unsold for one month, so taking 40

40+7=47

Mini on SS HKC

Trend over the past 2 weeks:

https://gladiator.tf/listings/6035a2092035fff2dd2db281

https://gladiator.tf/listings/6033dd6f42e087537f26ab59

https://gladiator.tf/listings/602c9a2bdc176ab93df8853d

https://gladiator.tf/listings/60289e7ffdb1e7f6b86608ff

https://gladiator.tf/listings/603ceb51a4c8d6b41deb7306

https://gladiator.tf/listings/603a64e36d1dd9872fe2d49b

https://gladiator.tf/listings/6038edd8074b6715ab13f074

Many of the listings are at 64-70, so taking 67

67-15=52

Mini on DBD KE

Previous suggestion:

https://backpack.tf/suggestion/5fe4be2ef0aa9b201a4addd3

72.5, in date

https://backpack.tf/profiles/76561199102407070#!/compare/1613260800/1613347200

84

https://backpack.tf/profiles/76561197982127154#!/compare/1614124800/1614211200

86

https://backpack.tf/profiles/76561198212497608#!/compare/1612224000/1612310400

https://backpack.tf/profiles/76561198132731667#!/compare/1614124800/1614211200

Untraceable

https://backpack.tf/profiles/76561198974703657#!/compare/1612310400/1612396800

Untraceable

(72.5+84+86)/3=80.83, taking 81

81-33=48, maxing out sale 12's BO.

Tree sales

44, 46, 41, 40, 47, 52, 43, 45, 42, 47, 48

In order

40, 41, 42, 43, 44, 45, 46, 47, 47, 48, 52

Tree trend over the past 2 weeks:

https://gladiator.tf/listings/602b00d7f97b3ebd85e435cf

https://gladiator.tf/listings/602c4be18161ade948d87807

https://gladiator.tf/listings/602d9e8f05a879767cc6c513

https://gladiator.tf/listings/602ed9c2248647fa80e27f10

https://gladiator.tf/listings/60303f5e16f4f7c104d29cc9

https://gladiator.tf/listings/60316897b50618a30bcb3e5c

https://gladiator.tf/listings/6032e0e1196d2e8293d3605c

https://gladiator.tf/listings/60343141eff8abf3d80bc1b7

https://gladiator.tf/listings/603561ef3d593f3e4c2fe28a

https://gladiator.tf/listings/6036e120ea3a98c7c0033f75

https://gladiator.tf/listings/60383617e5bdc821abcb525b

https://gladiator.tf/listings/603980943beabe8b30354e5f

https://gladiator.tf/listings/603aaeb041fd026e67ec06f9

https://gladiator.tf/listings/603bffda63437057e83d0feb

https://gladiator.tf/listings/603d4bc947c900f8c510974e

42-43.5 over the past 2 weeks

40, 41, and 42 seem a bit too low with many BOs at 43.5

48 and 52 seem a bit high considering the 46 one is still unsold.

So using 43-47 as the final result.