Item 1

https://backpack.tf/item/13080041227

History seems all gambled and traded with mannco store bots so probably unusable other than the first sale

Sale #1

Sold for a Haunted Wick Bombard Brigadier (seems too low)-

Seller: https://backpack.tf/profiles/76561199243245838#!/compare/1685577600/1686009600

Buyer: https://backpack.tf/profiles/76561198376885782#!/compare/1685750400/1685836800

Item 2

https://backpack.tf/item/12250479362

Sale #2

Untraceable-

Seller: https://backpack.tf/profiles/76561199052319732#!/compare/1683504000/1683763200

Buyer: https://backpack.tf/profiles/76561199059698603#!/compare/1683417600/1683504000

Sale #3

Sold for 13 keys + sweets-

Seller: https://backpack.tf/profiles/76561199059698603#!/compare/1684886400/1684972800

Buyer: https://backpack.tf/profiles/76561198066860118#!/compare/1683763200/1684972800

Sale #4

Sold for a Strange Steaming Crone's Dome (not usable, other usable sale is a bulk)-

Seller: https://backpack.tf/profiles/76561198066860118#!/compare/1683763200/1684972800

Buyer: https://backpack.tf/profiles/76561198119036173#!/compare/1676073600/1684972800

Item 3

https://backpack.tf/item/12180453606

Sale #5

Sold for 33 keys-

Seller: https://backpack.tf/profiles/76561199111292616#!/compare/1686614400/1686700800

Buyer: https://backpack.tf/profiles/76561199307464637#!/compare/1686614400/1686700800

Marketplace.tf Sales

https://marketplace.tf/items/tf2/31294;5;u269

MP.TF Sale #1

Sold for $139.99 on June 27, 2023

Keys @ $1.99

139.99/1.99 = 70.35ish keys

MP.TF Sale #2

Sold for $139.99 on August 3, 2023

Keys @ $1.95

139.99/1.95 = 71.79ish keys

Sales @ 13, 33, 70, 72

Taking 70-72 here