http://backpack.tf/item/476534409

History

Compare link: http://backpack.tf/profiles/76561198254233162#!/compare/1497657600/1497830400

Screenshot: https://imgur.com/gallery/Adp6Z

Sale at 10 keys and some items

Some items: Butcher Bird Grenade Launcher (WW) and Brain Candy Knife (FT)

B/O capped at 10.6 keys

Seller sold unusual and 1.66 ref and $1 USD

Taking 11 keys I guess, 10.6 rounds to 11 right.

In-date sale at 14 Keys(from the previous suggestion): https://backpack.tf/profiles/76561198057858014#!/compare/1491350400/1491436800

Credits to Minda for checking the previous suggestion

Taking a 11-14 range