Sale 1:

Sold with 8 ref (<0.5) for Disco Beat Down Base Metal Billycock (17.5)

http://www.tf2outpost.com/trade/28841173 - B/O of 16

Seller: http://backpack.tf/profiles/76561198040454757#!/compare/1490313600/1490400000

Buyer: http://backpack.tf/profiles/76561198087390671#!/compare/1490400000/1490486400

X = 16

Sale 2:

Sold for 10 keys + ~5 keys in items

No outpost

Seller: http://backpack.tf/profiles/76561198245131174#!/compare/1489881600/1490054400

Buyer: http://backpack.tf/profiles/76561198040454757#!/compare/1489881600/1490054400

X = 15

Sale 3:

Sold for Orbiting Fire Milkman (16)

http://www.tf2outpost.com/trade/28840986 - B/O of 14

Seller: http://backpack.tf/profiles/76561198008058845#!/compare/1489968000/1490054400

Buyer: http://backpack.tf/profiles/76561198245131174#!/compare/1489881600/1490054400

X = 14 (Capped by B/O)

Sale 4:

Quicksold for 13 keys

No outpost

Seller: http://backpack.tf/profiles/76561198355458687#!/compare/1491091200/1491177600

Buyer: http://backpack.tf/profiles/76561198041898052#!/compare/1491091200/1491177600

X = 13

Sale 5:

Sold for 11 keys + ~1 key in metal/items

No outpost

Seller: http://backpack.tf/profiles/76561198261400972#!/compare/1489190400/1489881600

Buyer: http://backpack.tf/profiles/76561198081815204#!/compare/1489795200/1489881600

X = 12

Sellers:

16 keys:

http://i.imgur.com/7TC4lOV.png

http://backpack.tf/u/76561197967159739

http://www.tf2outpost.com/trade/28862857 - 3 weeks

Sales at:

12

13

14

15

16

13 quicksold, and I can’t tell how long the sale at 12 was on the market for due to lack of B/O. Excluding 13 and below.

Going with 14-16.