EVENT SUGGESTION!

Sale 1: https://backpack.tf/profiles/76561198209195433#!/compare/1496448000/1496707200 - QS for 13 pure.

Sale 2: https://backpack.tf/profiles/76561198255951964#!/compare/1498694400/1498780800

Sold for a Clean Smoking Frenchman's Beret (13 keys)

Mini for the Beret: https://backpack.tf/profiles/76561198098522167#!/compare/1498608000/1498694400 - Sold for 13 pure.

Sale 3: https://backpack.tf/profiles/76561198188635351#!/compare/1496880000/1496966400 - 11 keys in items.

Sale 4: https://backpack.tf/profiles/76561198292156436#!/compare/1497398400/1497484800 - Ehh.

Sale 5: https://backpack.tf/profiles/76561198047860018#!/compare/1497744000/1497830400

Sold for a Strange Specialized Killstreak Australium Grenade Launcher (13 keys) + 1,55 ref in adds (lol)

Sale 6: https://backpack.tf/profiles/76561198283787257#!/compare/1498003200/1498089600

Sold with Earbuds (2 keys) for a Clean Terror-Watt Bubble Pipe (20 keys)

20 - 2 = 18

Mini for the Bubble Pipe: https://backpack.tf/profiles/76561198157089186#!/compare/1498435200/1498608000

Sold with 6 in adds for a Clean Purple Confetti Troublemaker's Tossle Cap (26 keys)

26 - 6 = 20

Sale 7: https://backpack.tf/profiles/76561198095965594#!/compare/1498435200/1498608000

Sold for a Clean Strange Starstorm Insomnia Wing Mann (15 keys)

Sales: 13 (QS), 13, 11, 13, 18 and 15. It quicksold for 13, so 11-13 will be outliers. Its unsold for 4 months at 16, so 18 is too high: http://i.imgur.com/QIBapJM.png. 15 flat sounds the best option here.