Sale 1:

Sold to scrap.tf for 10 keys + ~1 key in metal

Seller: https://backpack.tf/profiles/76561198198361445#!/compare/1536019200/1536278400

Buyer: https://backpack.tf/profiles/76561198135388328#!/compare/1536105600/1536192000

https://backpack.tf/item/6092070382

X = 11

Sale 2:

Sold with some metal for 11 keys

Seller: https://backpack.tf/profiles/76561198311498888#!/compare/1533945600/1534032000

Buyer: https://backpack.tf/profiles/76561198408350356#!/compare/1533945600/1534032000

https://backpack.tf/item/5416083363

X = 11

Sale 3:

Sold to a bot for 10 keys

Seller: https://backpack.tf/profiles/76561198316404854#!/compare/1534377600/1534464000

Buyer: https://backpack.tf/profiles/76561198515764827#!/compare/1534377600/1534464000

https://backpack.tf/item/5416083363

https://i.imgur.com/786SPYM.png

X = 10

Other Sales:

https://backpack.tf/item/6092070382 (#1)

https://backpack.tf/item/5723157802 (#2-4)

https://backpack.tf/item/5416083363 (#5

#1

Untraceable

https://backpack.tf/profiles/76561198264210577#!/compare/1535328000/1535587200

https://backpack.tf/profiles/76561198198361445#!/compare/1535155200/1535328000

#2

Bulk for Neutron Star Slope Scopers

https://backpack.tf/profiles/76561198228878680#!/compare/1529107200/1529193600

https://backpack.tf/profiles/76561198158206236#!/compare/1529107200/1529193600

#3

Untraceable, sold to scrap

https://backpack.tf/profiles/76561198158206236#!/compare/1529884800/1529971200

https://backpack.tf/profiles/76561198135388328#!/compare/1529798400/1529884800

#4

Untraceable

https://backpack.tf/profiles/76561198135388328#!/compare/1529971200/1530057600

https://backpack.tf/profiles/76561198240683630#!/compare/1529884800/1530057600

#5

Untraceable

https://backpack.tf/profiles/76561198408350356#!/compare/1534118400/1534464000

https://backpack.tf/profiles/76561198316404854#!/compare/1534377600/1534464000

Sellers:

https://i.imgur.com/Vz1djkX.png

https://i.imgur.com/7IdiPdX.png

https://backpack.tf/item/6092070382 - ~11.2 keys

https://backpack.tf/item/5723157802 - ~11.29 keys

https://backpack.tf/item/5416083363 - 1 ref higher than the last lol

Sales at:

10

11 (2x)

Going with 10-11.