Sale #1 = 125 keys

https://imgur.com/a/fK3IjLy

https://backpack.tf/profiles/76561198061489334#!/compare/1619654400/1619740800

https://backpack.tf/profiles/76561198049884052#!/compare/1619654400/1619740800

Sale #2 = 160 keys

https://backpack.tf/profiles/76561198055847835#!/compare/1616976000/1617321600

https://backpack.tf/profiles/76561198180048755#!/compare/1617235200/1617321600

Sale #3 = Sold for a Miami Nights HKC, which was instantly sold for 84 keys

https://backpack.tf/profiles/76561198107839402#!/compare/1619827200/1619913600

https://backpack.tf/profiles/76561198180048755#!/compare/1619827200/1619913600

~84 keys

In this case, I think that both sales 2 and 3 should be excluded. The user bought and sold the unusual for 160 keys and sold it in a matter of weeks for 84 keys. This was likely an impulse buy and impulse sell. I think that the general rules are that in these scenarios both sales should be excluded.

Final price = 125 keys