Nobody has priced it yet?

Using only recent week sales

Sales

#1

https://backpack.tf/profiles/76561198287103299#!/compare/1515456000/1515715200

14 keys

2#

https://marketplace.tf/items/30928;11

35$ = 18 keys

Keys were ~1.95$ at the time

3#

http://steamcommunity.com/market/listings/440/Strange%20Balloonihoodie

Keys were ~2.50$ at the time

27.14$ = 10.85 key

23.08$ = 9.25 key

35.70$ = 14.3 key

35.30$ = 14.1 key

27.16$ = 10.85 key

35.33$ = 14.15 key

35.93$ = 14.35 key

33.21$ = 13.3 key

45.85$ = 18.35 key

33.19$ = 13.3 key

45.56$ = 18.2 key

45.58$ = 18.25 key

46.39$ = 18.55 key

31.17$ = 12.45 key

Buyers:

SCM: https://imgur.com/a/ECeUT (10.2 - 12.4 key)

Classies: https://imgur.com/a/tcqjR (8 - 14 keys)

Sellers

Classies: https://imgur.com/a/LSeTL (18.4 keys)

SCM: https://imgur.com/a/bzDBZ (18 - 18.4 keys)

Mp.tf: https://imgur.com/a/GOSix (23 keys)

Summary

Everything under 14 keys completely an outlier or QS

Buyers @14 looks successfully - 5 sales in 14-14.5 range

Also 18 keys looks like a common trading point.

I'm not playing with decimals, range is wide in itself, no need to complicate this.