Removing Sale 2 per K1ng's advice.

https://backpack.tf/item/2674525408

Sale 1) Sold for 10 Keys + 22 or 24 Refined

https://backpack.tf/profiles/76561198304138933#!/compare/1520812800/1520899200

https://cdn.discordapp.com/attachments/298073323219320834/450894548894482444/unknown.png

Rounds to 11 Keys either way.

Sale 2) Sold + 4 Keys + Vintage Gunboats for a Smoking Modest Pile of Hat

https://backpack.tf/profiles/76561198042800563#!/compare/1520899200/1520985600

https://backpack.tf/profiles/76561198128953533#!/compare/1520899200/1520985600

http://www.tf2outpost.com/trade/29586843 - Capped by the Buyout of 13 Keys

High Outlier.

https://backpack.tf/item/2493423099

Sale 3) Sold for 10 Keys + 2 Refined

https://backpack.tf/profiles/76561198086433952#!/compare/1523059200/1523145600

https://cdn.discordapp.com/attachments/298073323219320834/450894548894482444/unknown.png

Low outlier.

Sale 4) Sold for 10 Keys + 22 Refined

https://backpack.tf/profiles/76561198304138933#!/compare/1523404800/1523491200

https://cdn.discordapp.com/attachments/298073323219320834/450894548894482444/unknown.png

Rounds to 11 Keys

https://backpack.tf/item/3344064673

Sale 5) Sold for 10 Keys + 22 or 24 Refined

https://backpack.tf/profiles/76561198327078449#!/compare/1520812800/1520899200

https://cdn.discordapp.com/attachments/298073323219320834/450894548894482444/unknown.png

Rounds to 11 Keys either way.

Sale 6) Sold for 12 Keys

https://backpack.tf/profiles/76561198167504005#!/compare/1520985600/1521072000

http://www.tf2outpost.com/trade/29619800 - This 1 Month Unsold at 13 Keys rules Sale 2 high.

https://imgur.com/a/s5sAYBy - These Buyers at 10.15, 10.07, and 10.04 Keys rule Sale 3 low.

https://backpack.tf/u/76561198091502579

https://backpack.tf/u/76561198304138933

https://backpack.tf/u/76561198327078449