Excluding Sale 1 because of the nature of this sale and Sale 2.

https://backpack.tf/item/4314386833

Sale 1) Sold for a Duped Scorching Flames Soldier's Stash (364 Keys) + 72 Keys

https://backpack.tf/profiles/76561198437172792#!/compare/1555632000/1555977600

High outlier.

Stash Mini

https://backpack.tf/profiles/76561198119149660#!/compare/1555804800/1555891200 - Sold for a Spellbound Executioner (427.5 Keys)

https://imgur.com/a/WcEO7q3 - Capped by the buyout of 375 Keys

https://backpack.tf/item/272102880 - This clean Stash was the 410 listing

https://marketplace.tf/items/tf2/54;5;u14 - Sold for $649 when Keys were ~$1.84 each

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

649 / 1.84 = 352.7, which rounds to 353 Keys

Sale 2) Sold for a Frostbite Head Warmer

https://backpack.tf/profiles/76561198069380992#!/compare/1556928000/1557014400

Low outlier.

Sale 3) Sold for a Sunbeams El Jefe (244 Keys) + Roboactive Tyrant's Helm (170 Keys)

https://backpack.tf/profiles/76561198306288794#!/compare/1559433600/1559520000

244 + 170 = 414, which I'll round to 415 Keys

[b]Tyrant's Mini/b]

https://backpack.tf/suggestion/5d2a2815d3817272a35f0db3 - 170 Keys