Item 1

https://backpack.tf/item/12948404946

Sale #1

Untraceable-

Seller: https://backpack.tf/profiles/76561198075602491#!/compare/1685318400/1686355200

Buyer: https://backpack.tf/profiles/76561198098758703#!/compare/1649894400/1690761600

Sale #2

Bulk?-

Seller: https://backpack.tf/profiles/76561198098758703#!/compare/1649894400/1690761600

Buyer: https://backpack.tf/profiles/76561198044547547#!/compare/1690675200/1690761600

Sale #3

Untraceable-

Seller; https://backpack.tf/profiles/76561198044547547#!/compare/1690675200/1690761600

Buyer: https://backpack.tf/profiles/76561198239945674#!/compare/1690502400/1690848000

Sale #4

Sold for 29 keys (ID "13327478494" of the unusual match)-

Seller: https://backpack.tf/profiles/76561198239945674#!/compare/1690502400/1690848000

Buyer: https://backpack.tf/profiles/76561198060043633#!/compare/1654214400/1690934400

Sale #5

Untraceable-

Seller: https://backpack.tf/profiles/76561198060043633#!/compare/1654214400/1690934400

Buyer: https://backpack.tf/profiles/76561198251921276#!/compare/1690848000/1690934400

Item 2

https://backpack.tf/item/12835022471

Sale #6

Sold for 38 keys (ID "13060632739" of the unusual match)-

Seller: https://backpack.tf/profiles/76561197995983788#!/compare/1684627200/1684886400

Buyer: https://backpack.tf/profiles/76561198166939443#!/compare/1684281600/1685059200

Sale #7

Only one key matches, untraceable-

Seller: https://backpack.tf/profiles/76561198166939443#!/compare/1685059200/1685664000

Buyer: https://backpack.tf/profiles/76561198258168272#!/compare/1685145600/1685318400

Sale #8

Untraceable?-

Seller: https://backpack.tf/profiles/76561198258168272#!/compare/1685318400/1685491200

Buyer: https://backpack.tf/profiles/76561198306870587#!/compare/1685318400/1685491200

Sale #9

Sold with two taunts for 46 keys + 65 refined, probably not usable seeing that it was two bots selling to one another?-

Seller: https://backpack.tf/profiles/76561198306870587#!/compare/1685491200/1685577600

Buyer: https://backpack.tf/profiles/76561198311498888#!/compare/1685491200/1685577600

Item 3

https://backpack.tf/item/12173446396

Sale #10

Sold for 27 keys, most likely someone dumped this quickly and the IDs just match, not using this either-

Seller: https://backpack.tf/profiles/76561199072654974#!/compare/1686700800/1686787200

Buyer: https://backpack.tf/profiles/76561199110809353#!/compare/1686700800/1686787200

Marketplace.tf Sales

https://marketplace.tf/items/tf2/31085;5;u142

MP.TF Sale #1

Sold for $59.99 on August 7, 2023

Keys @ $2.05

59.99/2.05 = 29.26ish keys

MP.TF Sale #2

Sold for $59.99 on August 9, 2023

Keys @ $1.98

59.99/1.98 = 30.30ish keys

MP.TF Sale #3

Sold for $59.99 on August 10, 2023

Keys @ $1.97

59.99/1.97 = 30.45ish keys

Sales @ 29, 29, 30, 30, 38

Taking 29-30 here