You’re not allowed to go outdated.

6 in a row

Sale 1:

Sold for 10 keys + Spec. KS Festive Minimal Pink Elephant Stickybomb Launcher (2) + ~1 key in metal/items

No outpost

Seller: http://backpack.tf/profiles/76561198162243670#!/compare/1489968000/1490400000

Buyer: http://backpack.tf/profiles/76561198083285862#!/compare/1490313600/1490400000

X = 13

Sale 2:

Sold for 12 keys

No outpost

Seller: http://backpack.tf/profiles/76561198148540751#!/compare/1494806400/1494979200

Buyer: http://backpack.tf/profiles/76561198055605614#!/compare/1494806400/1494892800

X = 12

Sale 3:

Quicksold for 9 keys + Zoomin’ Broom (1.7)

http://www.tf2outpost.com/trade/28847766 - Deleted B/O, seller confirms sale

Seller: http://backpack.tf/profiles/76561198144346135#!/compare/1490486400/1490572800

Buyer: http://backpack.tf/profiles/76561198193012223#!/compare/1490486400/1490572800

X = 11

Sellers:

~12.5 keys:

http://www.tf2outpost.com/trade/29187745 - young

http://backpack.tf/u/76561198316976324

Sales at:

11

12

13

11 quicksold. Excluding 11.

Going with 12-13.