Untraceable/Unusable sales:

https://backpack.tf/item/4586487904 - In and out of bots/marketplace

https://backpack.tf/item/4081534560 - mannco.trade stuff

#1

Untraceable. Histories suggest it was a marketplace.tf sale, but there are no marketplace.tf sales in the last 3 months.

https://backpack.tf/item/5787618869

https://backpack.tf/profiles/76561198150783829#!/compare/1532390400/1532476800

Sellers:

https://i.imgur.com/ElAoY2v.png

https://backpack.tf/item/4586487904 - ~11.43 keys, ~24 days

https://backpack.tf/item/4711379596 - 14 keys, ~1 month

https://backpack.tf/item/5787618869 - 14 keys, ~13 days

One on scrap.tf for ~11 keys:

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

https://backpack.tf/item/2346056136

https://backpack.tf/profiles/76561198135388328#!/compare/1534723200/1534809600 - Obtained several days ago.

Basing the unsold off of the ~11.43 key seller on the classifieds.

Going with 11 flat.