All the care you'll ever need

https://backpack.tf/item/10050347737

1)15 keys (Scorching Elf sold to Stonks Girl, then keys used to buy Heart Elf)

https://backpack.tf/profiles/76561199099031605#!/compare/1642982400/1643155200

https://backpack.tf/profiles/76561199110826678#!/compare/1643068800/1643155200

2)Untrace

https://backpack.tf/profiles/76561199110826678#!/compare/1643760000/1643846400

https://backpack.tf/profiles/76561199024067184#!/compare/1643760000/1643846400

3)Untrace

https://backpack.tf/profiles/76561199024067184#!/compare/1643846400/1643932800

https://backpack.tf/profiles/76561198446606701#!/compare/1643760000/1643846400

4)Untrace, possibly bulk for something else

https://backpack.tf/profiles/76561198446606701#!/compare/1643846400/1643932800

https://backpack.tf/profiles/76561198173442901#!/compare/1643846400/1643932800

5)Sold for 10 keys, 6.77 ref(Rounding to 10 keys)

https://backpack.tf/profiles/76561198173442901#!/compare/1644710400/1644883200

https://backpack.tf/profiles/76561199085116273#!/compare/1644624000/1644710400 - doesn't show up

6)Sold for 10 keys

https://backpack.tf/profiles/76561199085116273#!/compare/1646697600/1646784000

https://backpack.tf/profiles/76561198027544408#!/compare/1646697600/1646784000

7)Sold on mp.tf for 31.99 USD on 3/17

https://marketplace.tf/items/tf2/31176;5;u19

Keys that day were at 1.74 USD

https://marketplace.tf/items/tf2/5021;6

31.99/1.74 = 18.385 keys, rounding to 18 keys

Final sales at 10, 10, 15, & 18

Sales at 10 keys are excluded, since bot buy order are at 10.1 keys.

Taking 15 - 18 keys, no reason to exclude 18 keys