Strange Quack Canvassed War Paint (Factory New)

https://steamcommunity.com/market/listings/440/Strange%20Quack%20Canvassed%20War%20Paint%20%28Factory%20New%29

Dividing by the average price of a key on that day.

2 sold on January 12th:

$26.10/$2.23 = 11.7 keys

1 sold on January 28th:

$20.56/$2.16 = 9.5 keys

1 sold on January 31st:

$20.14/$2.14 = 9.4 keys

1 sold on February 8th:

$20.70/$2.14 = 9.7 keys

1 sold on February 25th:

$36.92/$2.22 = 16.6 keys

https://marketplace.tf/items/tf2/17201;11;w1;pk201

Dividing by the average price of a key on that day.

1 sold on February 13th:

$33.99/$1.78 = 19.1 keys

Outliers: 9.5 keys, 9.4 keys, and 9.7 keys.

Taking 11.7 - 19.1 keys as the range.