Sale 1:

Sold for Terror-Watt Barnstormer (14) + Green Confetti Hard Counter (Mini at 8.5 below)

http://www.tf2outpost.com/trade/29367133 - No B/O

Seller: https://backpack.tf/profiles/76561198040224815#!/compare/1505692800/1505779200

Buyer: https://backpack.tf/profiles/76561198068351675#!/compare/1505692800/1505779200

X = 23

Sale 2:

Sold with a key for Spec. KS Aussie Scattergun (23)

http://www.tf2outpost.com/trade/29361416 - B/O of 27

Seller: https://backpack.tf/profiles/76561197989166398#!/compare/1504828800/1504915200

Buyer: https://backpack.tf/profiles/76561198091840184#!/compare/1504483200/1504915200

X = 22

Sale 3:

Sold for Aus FaN (10) + ~5 keys in items (at the time)

No outpost

Seller: https://backpack.tf/profiles/76561198375232566#!/compare/1502496000/1504742400

Buyer: https://backpack.tf/profiles/76561197989166398#!/compare/1504656000/1504742400

X = 15

Green Confetti Hard Counter Mini:

Sold for 8 keys + 17 ref

Seller: https://backpack.tf/profiles/76561198304138933#!/compare/1509840000/1509926400

Buyer: https://backpack.tf/profiles/76561198380156373#!/compare/1509926400/1510099200

The rest of the ref can be seen in the seller’s end, matched with 4 of the keys involved in the trade.

X = 8.5

Sellers:

25 keys:

https://i.imgur.com/p8el2BM.png - 2 days

Sales at:

15

22

23

Buyers for any Ninja Hood at 16+. Excluding 15.

Going with 22-23.