Item 1:

https://backpack.tf/item/14068615755

Sale 1, 2, 3:

https://marketplace.tf/items/tf2/30866;5;u60

Sold for $21.59 on the 27th of June, 7th of July, 30th of August

Keys were

27th - $1.99 (21.59/1.99) = 10.8 (Rounding to 11 keys)

7th - $2.02 (21.59/2.02) = 10.68 (Rounding to 11 keys)

30th - $1.81 (21.59/1.81) = 11.9 (Rounding to 12 keys)

//

Sellers:

BPTF - https://imgur.com/a/cD5Zqyl - 3 @ 10.95 keys (2 for over a month)

MPTF - https://marketplace.tf/items/tf2/30866;5;u60 - None

STN - https://stntrading.eu/item/tf2/Unusual+Dead+Presidents+Warhood - None

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Warhood?filter=Dead+Presidents - None

Sale(s):

11, 11, 12

I am going to consider 12 an outlier due to the 2 unsolds at 10.95 for over a month. If it was 11 - 12 keys it would be a raise which wouldn't support the unsolds.

Going with 11 keys flat