Sale 1:

Sold for 16 keys + a “Nice Winter Crate Key” (2)

http://www.tf2outpost.com/trade/28863841 - B/O of 17

Seller: https://backpack.tf/profiles/76561198159855421#!/compare/1492128000/1492214400

Buyer: https://backpack.tf/profiles/76561198188368031#!/compare/1492214400/1492300800

The keys appear to have been traded to the seller’s bots afterwards.

X = 17 (Capped by B/O)

Sale 2:

Sold for 15 keys + 27.88 ref

http://www.tf2outpost.com/trade/28903996 - B/O of 17

Seller: https://backpack.tf/profiles/76561198112118278#!/compare/1492905600/1493683200

Buyer: https://backpack.tf/profiles/76561198098546985#!/compare/1493683200/1493769600

The keys and some of the metal was then used to purchase the Beams Capotain

X = 16

Sale 3:

Quicksold-ish for 13 keys + 14 ref (<0.5)

Seller: https://backpack.tf/profiles/76561198075108450#!/compare/1494979200/1495065600

Buyer: https://backpack.tf/profiles/76561197994697258#!/compare/1494979200/1495065600

X = 13

Sellers:

16 keys:

http://www.tf2outpost.com/trade/28892921 - 1 month

https://backpack.tf/u/76561198009435191

17 keys:

http://www.tf2outpost.com/trade/29202730 - young

http://backpack.tf/u/76561198078395610

Sales at:

13

16

17

13 quicksold, and there is a bot buyer for a little more than 13. Excluding 13.

Going with 16-17.