Sale 1:

Sold for Peace Sign Burg (Suggestion at 13.5) + ~12.5 keys in pure/items

No outpost

Seller: https://backpack.tf/profiles/76561198240449208#!/compare/1507161600/1507248000

Buyer: https://backpack.tf/profiles/76561198227757008#!/compare/1507161600/1507248000

The Haunted Executioner involved sold for a Strange Pocket Purrer (1.6)

https://backpack.tf/profiles/76561198240449208#!/compare/1507248000/1507334400

https://backpack.tf/item/1198596937

https://backpack.tf/item/5198595382 (pocket purrer)

X = 26

Sale 2:

Sold for 22 keys

Seller: https://backpack.tf/profiles/76561198337734785#!/compare/1506816000/1506902400

Buyer: https://backpack.tf/profiles/76561198259207654#!/compare/1506816000/1506902400

X = 22

Sale 3:

Sold for Logo Hat to Kill For (Suggestion at 19) + Strange Pro. KS Ambassador (3)

Seller: https://backpack.tf/profiles/76561198106495563#!/compare/1507939200/1508025600

Buyer: https://backpack.tf/profiles/76561198033378852#!/compare/1507939200/1508025600

X = 22

Sale 4:

Sold for Disco Beat Down Aviator Assassin

http://www.tf2outpost.com/trade/29386525 - B/O of 26

Seller: https://backpack.tf/profiles/76561198259207654#!/compare/1506816000/1506902400

Buyer: https://backpack.tf/profiles/76561198104240211#!/compare/1506729600/1506902400

Can be used on the Aviator.

Sale 5:

Bulk for Haunted Ghosts Chill Chullo and things

Seller: https://backpack.tf/profiles/76561198033378852#!/compare/1508198400/1508284800

Buyer: https://backpack.tf/profiles/76561198346118738#!/compare/1508112000/1508284800

Sale 6:

Bulk for Kill-a-Watt Hong Kong Cone

Seller: https://backpack.tf/profiles/76561198227757008#!/compare/1507593600/1507680000

Buyer: https://backpack.tf/profiles/76561198090147535#!/compare/1507507200/1507593600

Sale 7:

Sold with 4 keys for Purple Energy Brain-Warming Wear

Seller: https://backpack.tf/profiles/76561198346118738#!/compare/1508976000/1509148800

Buyer: https://backpack.tf/profiles/76561198094070608#!/compare/1508716800/1509148800

Should be used on the Brain

Logo Hat to Kill For:

https://backpack.tf/suggestion/5a01e79b44325a3bc87e46cb (read comments)

Peace Burglerre:

https://backpack.tf/suggestion/5a1e864fcf6c755f2d2919ff

Sellers:

27 keys:

https://i.imgur.com/RgHZzeC.png - 6 days

Sales at:

22 (2x)

26

Going with 22-26.