Using last month.

Sale 1:

Sold for 9 keys + 15 ref

Seller: https://backpack.tf/profiles/76561198344933095#!/compare/1524182400/1524268800

https://backpack.tf/item/5054763486 - Buyer can’t be identified. It’s not the bot you see in the compare link, someone bought it and dumped it on the bot before their backpack was scanned.

X = 9.5

Sale 2:

Sold for 9 keys (Buyer’s compare link)

Seller: https://backpack.tf/profiles/76561198344933095#!/compare/1524787200/1524873600

Buyer: https://backpack.tf/profiles/76561198056531196#!/compare/1524787200/1524873600

Bot.tf confirms: https://i.imgur.com/Fkc4yn9.png

X = 9

Sellers:

9 keys:

https://i.imgur.com/17AX1id.png

https://backpack.tf/item/6036084246

18 keys:

https://i.imgur.com/Of1Rhka.png

https://backpack.tf/item/5322931490

80 keys:

http://www.tf2outpost.com/trade/28696355

Sales at:

9

9.5

Not using 9.5, because it isn’t traceable.

Going with 9 flat.