Sale 1:

Sold for Logo Head Hedge (Suggestion at 11) + Kazotsky Kick + Genuine Killstreak Three-Rune Blade (~3.5 together)

Seller: https://backpack.tf/profiles/76561198053717045#!/compare/1549670400/1549756800

Buyer: https://backpack.tf/profiles/76561198046772407#!/compare/1548979200/1549670400

https://backpack.tf/item/296338736

X = 15

Sale 2:

Quicksold for 12 keys + ~1 key in metal

Seller: https://backpack.tf/profiles/76561198091764640#!/compare/1545609600/1545696000

Buyer: https://backpack.tf/profiles/76561198388578474#!/compare/1545609600/1545696000

https://backpack.tf/item/296338736

X = 13

Other Sales:

https://backpack.tf/item/296338736 (#1-6)

#1

Untraceable

https://backpack.tf/profiles/76561198311498888#!/compare/1545609600/1545696000

https://backpack.tf/profiles/76561198394903250#!/compare/1545523200/1545609600

#2

Bulk for Burning Phantom

https://backpack.tf/profiles/76561198388578474#!/compare/1546300800/1546387200

https://backpack.tf/profiles/76561198273681900#!/compare/1546300800/1546387200

#3

Untraceable

https://backpack.tf/profiles/76561198273681900#!/compare/1549065600/1549152000

https://backpack.tf/profiles/76561198351875391#!/compare/1540166400/1549065600

#4

Bulk for PE Marauder

https://backpack.tf/profiles/76561198132111326#!/compare/1549584000/1549670400

https://backpack.tf/profiles/76561198053717045#!/compare/1549497600/1549670400

#5

Untraceable

https://backpack.tf/profiles/76561198046772407#!/compare/1548979200/1549670400

https://backpack.tf/profiles/76561198290980518#!/compare/1549584000/1549670400

#6

https://backpack.tf/profiles/76561198290980518#!/compare/1549670400/1550102400

https://backpack.tf/profiles/76561198134538517#!/compare/1549238400/1550275200

at least 18 keys match in the buyer’s end, so more must’ve been involved in the trade.

Logo Head Hedge:

https://backpack.tf/suggestion/5c87b410d381721c15691743

Sellers:

https://i.imgur.com/XnaHsAl.png

https://backpack.tf/item/5503456757 - 16 keys

https://backpack.tf/item/296338736 - 16 keys

Sales at:

13

15

13 quicksold, excluding 15.

Going with 15 flat.