Elf

https://backpack.tf/item/9712065099

Sale 1: $17.49 on marketplace https://marketplace.tf/items/tf2/31176;5;u7

17.49/1.81 = 9.66, rounding to 9.5k

https://backpack.tf/item/10123503764

Sale 2: Untrace

Buyer: https://backpack.tf/profiles/76561197992444571#!/compare/1633564800/1633651200

Seller: https://backpack.tf/profiles/76561198850178158#!/compare/1633564800/1633651200

https://backpack.tf/item/10004663101

Sale 3: Untrace

Buyer: https://backpack.tf/profiles/76561198048851745#!/compare/1631145600/1631232000

Seller: https://backpack.tf/profiles/76561199046607258#!/compare/1631145600/1631232000

Sale 4: Untrace: a lot of sets of keys, but none ID match and all are under buy orders.

Buyer: https://backpack.tf/profiles/76561199046607258#!/compare/1631145600/1631232000

Seller: https://backpack.tf/profiles/76561198319336957#!/compare/1631232000/1631664000

Sale 5: $13.89 on mannco https://mannco.store/item/440-purple-confetti-unusual-elf-care-provider

13.89/1.66 = 8.37, rounding to 8.5k

Ignoring all the intermediate trades on aug 31st.

Sale 6: Untrace

Buyer: https://backpack.tf/profiles/76561197968575242#!/compare/1630281600/1630368000

Seller: https://backpack.tf/profiles/76561199084784906#!/compare/1630281600/1630368000

Ignoring the quicksell.store bot tradebacks.

Taking 8.5-9.5