Resuggestion, thanks to FishCrimes for the info!

Sale 1:

https://backpack.tf/profiles/76561198204574817#!/compare/1531699200/1531785600

https://backpack.tf/profiles/76561198301663376#!/compare/1531440000/1531785600

Sold for 11 keys

Sale 2:

https://backpack.tf/profiles/76561198301663376#!/compare/1532131200/1532476800

https://backpack.tf/profiles/76561198051888098#!/compare/1532390400/1532476800

Sold for C9 Hedge(14.5)

Sale 3:

https://backpack.tf/profiles/76561198051888098#!/compare/1532476800/1532563200

QS to bot

Sale 4:

https://backpack.tf/profiles/76561198315588518#!/compare/1532649600/1532736000

https://backpack.tf/profiles/76561198349373309#!/compare/1532649600/1532736000

Sold for 11 keys + 15 ref (ID Match)

Sale 5:

https://backpack.tf/profiles/76561198349373309#!/compare/1532736000/1532822400

https://backpack.tf/profiles/76561198296350441#!/compare/1532736000/1532822400

Sold for Aces Metal Slug + 10 keys

Slug Mini:

https://backpack.tf/suggestion/5b95c9a744325a31781cfff0

Suggestion for 9.25 keys

Total is 19.5 keys

Sale 6:

https://backpack.tf/profiles/76561198296350441#!/compare/1533686400/1535673600

https://backpack.tf/profiles/76561198054136616#!/compare/1535587200/1535673600

Sold with negligible sweets for Stormy Hedge(13.5)

Sale 7:

https://backpack.tf/profiles/76561198054136616#!/compare/1535760000/1535932800

Sold for KaW Platinum Pickle + ~ 1 key in sweets

Use there.

Sale 8:

https://marketplace.tf/items/600;5;u32

Sold for 26 USD

Keys at 1.93 USD

total is 13.47 keys

Total sales @:

11, 11, 13, 13.47, 19.5 keys

https://i.imgur.com/PD96JR5.jpg

Seller at 17,

https://backpack.tf/item/4018199371

Buyers up to 10 keys

Calling 19 high.

Calling 11 low, lets take 13 keys.

FishCrimes' part:

15 is invalid, B/O for sale 2 caps at 13 keys: http://www.tf2outpost.com/trade/29714328

-Sold for 14 keys + some ref: https://backpack.tf/profiles/76561198061465151#!/compare/1530835200/1531180800

-Another bot.tf sale in June that's still in date that can be used supportively if you wanna look into it

With that dangerously close sale at 13.5 and this sale at 14, I think 13-14 is the call. Not gonna close since I should have looked into this deeper and pointed this mistake out in the last suggestion.