Sale 1:

https://backpack.tf/profiles/76561198091502579#!/compare/1603929600/1604016000

https://backpack.tf/profiles/76561198137349289#!/compare/1602028800/1607731200

Untrace.

Marketplace.tf: https://marketplace.tf/items/tf2/30959;5;u62

Sale 2:

Sep 14 - $29.36 / $1.85 = 15.87 keys, No B/O

= 16 Keys.

Sale 3:

Oct 28 - $25 / $1.83 = 13.66 keys, No B/O

= 14 Keys.

Sale 4:

Nov 1 - $39.99 / $1.82 = 21.97 keys, No B/O

= 22 Keys.

Blaze.xTH3RM4Lx: https://backpack.tf/suggestion/5fda2379b1c0c05f4543cef7#comment-600d66960a461f237d6c169b

https://gyazo.com/6fe5234aeb16c2e21936dfdcfc6b90a3

https://backpack.tf/item/7146250534 - was up at 18 keys for 8 days

https://backpack.tf/profiles/76561198967088046#!/compare/1608595200/1608768000 - later looks to have sold for 14 keys + taunt (15 keys)

22 is looking like an outlier now. 14 - 16 would be more suitable here