Resuggesting! Thank you to Blaze for letting me know of the issue with the seller now!

Item 1

https://backpack.tf/item/13646255408

Sale #1

Sold for 12 keys (ID "13698293137" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198078384720#!/compare/1697846400/1697932800

Buyer: https://backpack.tf/profiles/76561198040803504#!/compare/1697760000/1697846400

Sale #2

Sold with a Sapped Splitting Headache for an unknown amount-

Seller: https://backpack.tf/profiles/76561198040803504#!/compare/1698883200/1698969600

Buyer: https://backpack.tf/profiles/76561198045466865#!/compare/1698969600/1699056000

Item 2

https://backpack.tf/item/13639066957

Ignoring the trade-back that happened between OJ and ronn

Sale #3

Untraceable? Probably gambled-

Seller: https://backpack.tf/profiles/76561198113622176#!/compare/1700265600/1700870400

Buyer: https://backpack.tf/profiles/76561199245733895#!/compare/1700438400/1700524800

Sale #4

Gambled again?-

Seller: https://backpack.tf/profiles/76561199245733895#!/compare/1700438400/1700524800

Buyer: https://backpack.tf/profiles/76561198044852450#!/compare/1700438400/1700524800

Sale #5

Sold with a Kill-a-Watt Elf Defense for an unknown amount-

Seller: https://backpack.tf/profiles/76561198044852450#!/compare/1700438400/1700524800

Buyer: https://backpack.tf/profiles/76561199157328830#!/compare/1700438400/1700524800

Sale #6

Sold with a Non-Craftable KS Stickybomb Launcher Kit (19 refined, taking buyers) + 3 keys for a Stellar Ascent Splitting Headache (25.5 keys) (using this to price this given it would be too low for the Headache) = 25.5-3.32 = 22.18ish keys-

Seller: https://backpack.tf/profiles/76561199157328830#!/compare/1700784000/1700870400

Buyer: https://backpack.tf/profiles/76561198417055350#!/compare/1700352000/1700870400

Sale #7

Untraceable?-

Seller: https://backpack.tf/profiles/76561198417055350#!/compare/1702339200/1703203200

Buyer: https://backpack.tf/profiles/76561198376885782#!/compare/1702598400/1702684800

Item 3

https://backpack.tf/item/13642314859

Sale #8

Untraceable?-

Seller: https://backpack.tf/profiles/76561198161266967#!/compare/1701129600/1707350400

Buyer: https://backpack.tf/profiles/76561199564942025#!/compare/1705881600/1705968000

Sale #9

Untraceable?-

Seller: https://backpack.tf/profiles/76561199564942025#!/compare/1706140800/1706227200

Buyer: https://backpack.tf/profiles/76561197995973040#!/compare/1706140800/1706227200

Sales @ 12, 22

Taking 12 flat :3