Sale 1:

Sold for $21.7 on Marketplace.tf

https://marketplace.tf/items/330;5;u61

https://backpack.tf/item/3567713805

21.7/1.94 = ~11.2

X = 11

Sale 2:

Sold for Strange C.A.P.P.E.R (7) + 3 keys

No outpost

Seller: https://backpack.tf/profiles/76561198191156130#!/compare/1501632000/1501718400

Buyer: https://backpack.tf/profiles/76561198326093863#!/compare/1501632000/1501718400

X = 10

Sale 3:

Sold with a key for Planets Larrikin Robin + Strange Sub Zero Suit (3)

http://www.tf2outpost.com/trade/29309247 - B/O of < 10.5, was apparently offered 10.

Seller: https://backpack.tf/profiles/76561198131555957#!/compare/1501718400/1501804800

Buyer: https://backpack.tf/profiles/76561198250056830#!/compare/1501718400/1501804800

Will easily cap at the B/O.

X = 10 (Capped by B/O, rounded)

Sale :

Bulk for Tesla Coil Air Dog

Seller: https://backpack.tf/profiles/76561198263385646#!/compare/1502841600/1502928000

Buyer: https://backpack.tf/profiles/76561198056793444#!/compare/1502755200/1502841600

Sales at:

10 (2x)

11

R+ubi is paying ~10.5 for this here:

https://docs.google.com/spreadsheets/d/1St9ieYgU8EZKTXjG8R-mdcESNSOjMDPKeJTjb0DYU90/edit#gid=547237982

http://i.imgur.com/PEXLdIo.png

Excluding 10.

Going with 11 flat.