Item:

https://backpack.tf/item/15542066577

(Easier to see from buyer side)

buyer:

https://backpack.tf/profiles/76561198120031096#!/compare/1772496000/1772755200

Seller:

https://backpack.tf/profiles/76561199072611396#!/compare/1772668800/1772755200

10k

Item:

https://backpack.tf/item/15062505834

Buyer:

https://backpack.tf/profiles/76561199306781068#!/compare/1776902400/1777766400

Seller:

https://backpack.tf/profiles/76561198885758121#!/compare/1777680000/1777766400

Looks like user just listed it for sale through a bot?

Same item, previous movement:

Buyer:

https://backpack.tf/profiles/76561198885758121#!/compare/1777593600/1777680000

Seller(stn):

https://backpack.tf/profiles/76561199581722058#!/compare/1777593600/1777680000

9k

Same item:

Seller:

https://backpack.tf/profiles/76561198186929822#!/compare/1777420800/1777766400

buyer(stn):

https://backpack.tf/profiles/76561199581722058#!/compare/1777593600/1777680000

Rounds down to 8k (from 8k 27.88 ref). Too low to use, excluding

Same item:

Seller(scraptf bot, could be auction):

https://backpack.tf/profiles/76561198135388328#!/compare/1777248000/1777334400

Buyer:

https://backpack.tf/profiles/76561198186929822#!/compare/1777248000/1777420800

Could be auction/bulk sale

Same item:

Seller:

https://backpack.tf/profiles/76561198035829786#!/compare/1775692800/1775779200

Buyer(scraptf bot):

https://backpack.tf/profiles/76561198135388328#!/compare/1775606400/1775692800

Item:

https://backpack.tf/item/16653793685

All movements in the last 3 months are quicksell.store bots shuffling them around lol

Item:

https://backpack.tf/item/16744540138

Most recent movement is depositing into Mannco bot:

https://backpack.tf/profiles/76561198125933672#!/compare/1777593600/1778025600

Previous movement:

Buyer:

https://backpack.tf/profiles/76561198125933672#!/compare/1776902400/1777593600

Seller:

https://backpack.tf/profiles/76561199059800460#!/compare/1774310400/1774396800

The IDs for 11 Keys match (Near ID: 16848990638) in the bot's compare from the "Buyer has big gaps" sale. (Thanks Shuffle!)

Item:

https://backpack.tf/item/15114071484

Seller:

https://backpack.tf/profiles/76561198023385860#!/compare/1773014400/1774656000

Buyer(quicksell.store bot):

https://backpack.tf/profiles/76561199110809353#!/compare/1774656000/1777420800

Again huge indexing gaps

Item:

https://backpack.tf/item/16747464484

Seller:

https://backpack.tf/profiles/76561199244799052#!/compare/1776211200/1778025600

Buyer(quicksell.store bot):

https://backpack.tf/profiles/76561199084784906#!/compare/1776211200/1776297600

Previous movement:

Buyer:

https://backpack.tf/profiles/76561199244799052#!/compare/1775952000/1776211200

Seller(qs store bot):

https://backpack.tf/profiles/76561199085116273#!/compare/1776124800/1776211200

Bulk trade, mismatching histories

Taking 9-11 keys

Thanks Shuffle Spy for all the help.