Over 1 year outdated. Let's go.

1. Sale at SCM-$29.99: https://vgy.me/LQSc1z.png (I get $26.09 after fee)

https://backpack.tf/item/5201152017

29.99/2.18=13.75, Rounding to 14

2. Sale at SCM-$21.97: https://vgy.me/oeX0AY.png (I pay $21.97 pre-fee)

https://backpack.tf/item/5201152017

21.97/2.18=10. Low outlier, multiple SCM quickbuyers at/near/above this price.

SCM Page is glitched, if someone lists a Strange Bombing Past, then the page will work. https://steamcommunity.com/market/listings/440/Strange%20Unusual%20Spirit%20of%20the%20Bombing%20Past

No other usable sales.

Young seller at 15 keys: https://vgy.me/PYPWRS.png

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Going with 14 flat.