Resuggest from https://backpack.tf/suggestion/5fa9ac6f99eaad6efc138e0f#comment-5fcfe9d6d9f8e337a6682ec0 (thx Blaze)

Taking sales in the past month

Marketplace.tf: https://marketplace.tf/items/tf2/17232;11;w1;pk232

October 14: $49.99/1.1.86=26.88 keys

SCM sales: https://steamcommunity.com/market/listings/440/Strange%20Alien%20Tech%20War%20Paint%20%28Factory%20New%29

October 16 3 AM: $52.9/2.34=22.61 keys

October 20 8 AM: $53.08/2.35=22.59 keys

October 25 11 PM: $34.5/2.31=14.94 keys

New sales provided by Blaze:

https://steamcommunity.com/market/listings/440/Strange%20Alien%20Tech%20War%20Paint%20%28Factory%20New%29 - new sales at 23~ keys and 24~ keys

https://marketplace.tf/items/tf2/17232;11;w1;pk232 - new sales at $53 (30 keys), $48.99 (28~ keys)

We have 15, 22.5, 22.5, 23, 24, 27, 28, 30.

15 looks like a low outlier, going 22.5-30