Sale 1:

Sold for Miami Nights Hard Counter (12) + Bills (~2)

http://www.tf2outpost.com/trade/28318980 - No visible B/O

Seller: http://backpack.tf/profiles/76561198061440669#!/compare/1467849600/1467936000

Buyer: http://backpack.tf/profiles/76561198111094443#!/compare/1467936000/1468022400

X = 14

Sale 2:

Sold for 12 keys

http://www.tf2outpost.com/trade/28367099 - Deleted B/O

Seller: http://backpack.tf/profiles/76561198002186909#!/compare/1469923200/1470009600

Buyer: http://backpack.tf/profiles/76561198069546835#!/compare/1470009600/1470096000

X = 12

Sale 3:

Sold with Black Bearded Bombardier for Terror-Watt Cyborg Stunt Helm (12)

No outpost

Seller: http://backpack.tf/profiles/76561198111094443#!/compare/1468022400/1468108800

Buyer: http://backpack.tf/profiles/76561198002186909#!/compare/1468022400/1468108800

Valuing the beard at less than half a key

X = 12

Miami Hard Counter Mini: (Fluffy and I both needed a mini for it lol)

http://backpack.tf/profiles/76561198125791160#!/compare/1471132800/1471219200 - Sold for 12 keys, credits to Fluffy for this mini

http://i.imgur.com/YgrYaz5.png

Sellers:

13 keys:

http://www.tf2outpost.com/trade/28454988 - 2 weeks

Sales at:

12 (2x)

14

With the seller at 13 going unsold for 2 weeks, as well as 2 sales at 12, it would be fair to rule 14 out. There’s also a good chance that the seller had a B/O of less than 14 on backpack.

Going with 12 flat