Sale 1:

Sold for Australium Minigun

http://www.tf2outpost.com/trade/28533836 - B/O of 19

Seller: http://backpack.tf/profiles/76561198081546273#!/compare/1476489600/1476576000

Buyer: http://backpack.tf/profiles/76561198150526374#!/compare/1476489600/1476576000

X = 18

Sale 2:

Quicksold for 16 keys

No outpost

Seller: http://backpack.tf/profiles/76561198002757046#!/compare/1475971200/1476057600

Buyer: http://backpack.tf/profiles/76561198081546273#!/compare/1475971200/1476057600

X = 16

Sale 3:

Sold for Smoking Minnesota Slick + 1 key

Seller: http://backpack.tf/profiles/76561198009272632#!/compare/1475539200/1475625600

Buyer: http://backpack.tf/profiles/76561198132282210#!/compare/1475539200/1475625600

Should probably be used to price the slick

Sale 4:

Sold for Green Confetti Crocleather Slouch

http://www.tf2outpost.com/trade/28076231 - No B/O (that’s...a lot of views)

Seller: http://backpack.tf/profiles/76561198065683178#!/compare/1472169600/1472860800

Buyer: http://backpack.tf/profiles/76561198097135729#!/compare/1472774400/1472860800

Sellers:

17 keys:

http://i.imgur.com/6ZxoiQ9.png - 5 days

http://backpack.tf/u/76561198048851745

19 keys:

http://i.imgur.com/xVCv7zA.png

http://backpack.tf/u/76561198132282210

http://www.tf2outpost.com/trade/28538086 - 2 weeks (listed at 19.5)

http://www.tf2outpost.com/trade/28486555 - 1 month

http://backpack.tf/u/76561197988705887

20 keys:

http://www.tf2outpost.com/trade/28550256 - 1 week, 9 views at time of suggesting

http://backpack.tf/u/76561198096760247

22 keys:

http://www.tf2outpost.com/trade/28453822 - 1 month

https://backpack.tf/u/76561198118496274

Sales at:

16

18

Sale at 16 sold in about a day. Therefore, excluding.

Seller at 17 keys for 5 days

Going with 17-18