https://marketplace.tf/items/tf2/31117;5;u29

September 22: $22.22/1.85=12.01 ~12 keys https://backpack.tf/item/9203382968

September 30: $29.99/1.85=16.21 ~16 keys https://backpack.tf/item/9211386681

October 7: $29.99/1.86=16.12 ~16 keys (UNTARCEABLE)

October 18: $13.11/1.87=7.07 ~7 keys (UNTRACEABLE)

October 23: $29.99/1.86=16.12 ~16 keys https://backpack.tf/item/9237032726

Untraceable:

https://backpack.tf/profiles/76561198360643050#!/compare/1602028800/1602115200

https://backpack.tf/profiles/76561198135755120#!/compare/1601337600/1602028800

We have 7, 12, 16, 16 and 16

Excluding 7 because there are buyers at 8 keys.

Even though there are 3 sales at 16 vs 1 at 12, gonna include 12 because it doesn't look like a quicksell at all, the sale on September 20 at 12.03 (now outdated) and the sale at 7 also support including 12

gonna go 12-16