Sale #1

https://backpack.tf/item/15647260051

40 keys 54.11 ref for the Topper + Circling Peace Sign Optic Nerve

Seller: https://backpack.tf/profiles/76561198126477668#!/compare/1745452800/1745539200 (ID: 15670005738)

Buyer: https://backpack.tf/profiles/76561199026390261#!/compare/1745452800/1745452800/nearest (ID: 15670005870)

STN pays 9 keys 44.66 ref for the Optic Nerve

40 keys 54.11 ref - 9 keys 44.66 ref = 31 keys ~9.55 ref

Rounding to 31

Sale #2

https://backpack.tf/item/15647260051

33 keys

Seller: https://backpack.tf/profiles/76561198311498888#!/compare/1747612800/1747699200 (ID: 15753393577)

Buyer: https://backpack.tf/profiles/76561199039971607#!/compare/1747612800/1747699200

Sale #3

https://backpack.tf/item/15579217861

Untraceable

https://backpack.tf/profiles/76561198261580503#!/compare/1743638400/1743724800

Sale #4

https://backpack.tf/item/14446045868

Massive bulk sale

https://backpack.tf/profiles/76561199108309959#!/compare/1743638400/1743724800

Sale #5

https://backpack.tf/item/14116626723

32 keys

Seller: https://backpack.tf/profiles/76561199581722058#!/compare/1744156800/1744243200 (ID: 15623409785)

Buyer: https://backpack.tf/profiles/76561198161980756#!/compare/1744156800/1744243200

Sale #6

https://backpack.tf/item/14116626723

Bulk for a Morning Glory Kiss King

Seller: https://backpack.tf/profiles/76561198161980756#!/compare/1744502400/1744588800 (ID: 15637219845)

Use there

Sale #7

https://backpack.tf/item/10882928471

32 keys 19.11 ref

Seller: https://backpack.tf/profiles/76561199098968316#!/compare/1746748800/1746835200 (ID: 15723159144)

Buyer: https://backpack.tf/profiles/76561199193412191#!/compare/1746835200/1746921600

Rounding to 32

Sale #8

https://backpack.tf/item/10857513016

Eyes of Molten Twisted Topper + 21 keys for an Ominous Stare Twisted Topper

Seller: https://backpack.tf/profiles/76561198204433859#!/compare/1744761600/1745366400

Buyer: https://backpack.tf/profiles/76561198088878793#!/compare/1745280000/1745366400

Ominous Stare Twisted Topper mini

https://backpack.tf/item/14496420828

48 keys

Seller: https://backpack.tf/profiles/76561198057412106#!/compare/1743897600/1743984000 (ID: 15616217830)

Buyer: https://backpack.tf/profiles/76561199199136084#!/compare/1743984000/1743811200

Back to Sale #8

48 - 21 = 27

27

Sale #9

https://backpack.tf/item/10851482140

32 keys 2.55 ref

Seller: https://backpack.tf/profiles/76561198025598311#!/compare/1738627200/1744156800 (ID: 15621334695)

Buyer: https://backpack.tf/profiles/76561199389274250#!/compare/1744070400/1744156800

Rounding to 32

Sale #10

https://backpack.tf/item/10851482140

32 keys 13.66 ref

Seller: https://backpack.tf/profiles/76561199389274250#!/compare/1746316800/1746403200 (ID: 15707769817)

Buyer: https://backpack.tf/profiles/76561199192088525#!/compare/1746316800/1746403200

Rounding to 32

Sale #11

https://backpack.tf/item/10835803282

30 keys + ~3 keys in sweets

Seller: https://backpack.tf/profiles/76561198109939474#!/compare/1745452800/1745625600

Buyer: https://backpack.tf/profiles/76561199276543055#!/compare/1745539200/1745625600

Rounding to 33

Sale #12

https://backpack.tf/item/10835803282

~35 keys in crap

Seller: https://backpack.tf/profiles/76561199276543055#!/compare/1745798400/1745884800

Buyer: https://backpack.tf/profiles/76561199195207796#!/compare/1745193600/1745884800

Rounding to 35 for simplicity

Sale #13

https://backpack.tf/item/10835803282

Untraceable

https://backpack.tf/profiles/76561199195207796#!/compare/1747180800/1747440000

Sale #14

https://backpack.tf/item/10835803282

Untraceable

https://backpack.tf/profiles/76561198947461936#!/compare/1736899200/1747612800

Sale #15

https://backpack.tf/item/10824133707

Untraceable

https://backpack.tf/profiles/76561198968467991#!/compare/1740960000/1743465600

Sale #16

https://backpack.tf/item/10824133707

Bulk, unknown

https://backpack.tf/profiles/76561199202995855#!/compare/1741910400/1747267200

Sale #17

https://backpack.tf/item/10816243418

Cashout

https://backpack.tf/profiles/76561198074378939#!/compare/1742428800/1742774400

Sale #18

https://backpack.tf/item/10762647260

Untraceable

https://backpack.tf/profiles/76561198257908042#!/compare/1742601600/1742688000

Sale #19

https://backpack.tf/item/10762647260

36 keys (1 key used to buy around a key worth of stuff)

Seller: https://backpack.tf/profiles/76561198349848918#!/compare/1746144000/1746230400

Buyer: https://backpack.tf/profiles/76561198002990168#!/compare/1745884800/1746576000

Current sellers:

$70.00 on mp.tf

$64.99 on mannco.store

$79.99 on mannco.store

35.45 keys on bp.tf (2x)

36 keys on bp.tf

37 keys on bp.tf (4x)

31 keys 62.22 ref on STN

Sales: 31, 33, 32, 32, 27, 32, 32, 33, 35, 36

27 key sale is disproportionately low and uses a mini that might be a quicksale. There is a 32 key unsold seller on STN that should counter the high sales of 35 and 36, but 33 is common enough that it must be included in the range.

Final price: 31 - 33