The Sale:

Bought from scrap with some metal for 13 keys

Seller: https://backpack.tf/profiles/76561198135388328#!/compare/1533772800/1533859200

Buyer: https://backpack.tf/profiles/76561198049072204#!/compare/1533772800/1533859200

https://backpack.tf/item/6940512448

X = 13

Other Sales:

https://backpack.tf/item/6241570918 (#1)

https://backpack.tf/item/6813309634 (#2)

https://backpack.tf/item/6940512448 (#3-7, the rest were gambled)

https://backpack.tf/item/5895054046 - mannco stuff

#1

Untraceable

https://backpack.tf/profiles/76561198359251673#!/compare/1534636800/1535155200

https://backpack.tf/profiles/76561198311498888#!/compare/1534636800/1534723200

#2

Untraceable, sold to scrap

https://backpack.tf/profiles/76561197983457698#!/compare/1536537600/1537747200

https://backpack.tf/profiles/76561198135388328#!/compare/1536537600/1536624000

#3

Untraceable, sold to scrap

https://backpack.tf/profiles/76561198107224390#!/compare/1530144000/1530316800

https://backpack.tf/profiles/76561198135388328#!/compare/1530230400/1530316800

#4

Untraceable, bought from scrap

https://backpack.tf/profiles/76561198135388328#!/compare/1531180800/1531267200

https://backpack.tf/profiles/76561198272434084#!/compare/1531180800/1531267200

#5

Sold for Spelled junk

https://backpack.tf/profiles/76561198272434084#!/compare/1531267200/1531353600

https://backpack.tf/profiles/76561198272881838#!/compare/1531267200/1531353600

#6

Bulk to scrap for Stormy Cotton Head

https://backpack.tf/profiles/76561198272881838#!/compare/1531440000/1531526400

https://backpack.tf/profiles/76561198135388328#!/compare/1531440000/1531526400

#7

Untraceable

https://backpack.tf/profiles/76561198049072204#!/compare/1533945600/1534118400

https://backpack.tf/profiles/76561198190051775#!/compare/1534118400/1534204800

Probably did sell for the items in the compare link, which came from here:

https://backpack.tf/profiles/76561198119577562#!/compare/1534032000/1534118400

If so, this will also end up being 13 keys.

Sellers:

https://i.imgur.com/p6DCCm5.png

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

https://backpack.tf/item/6813309634 - ~14 keys

https://backpack.tf/item/5833467311 - 18 keys

Sales at:

13

Scrap used to base their prices off of the low-end, but they no longer appear to be doing that, which would explain the difference between the sale we have and the current listing price on scrap.

Going with 13 flat.

Bought from scrap for 12 keys + ~1 key in metal

Seller: https://backpack.tf/profiles/76561198135388328#!/compare/1539648000/1539734400

Buyer: https://backpack.tf/profiles/76561198174062770#!/compare/1539648000/1539734400

https://backpack.tf/item/5882960227

https://i.imgur.com/r7oskht.png - being re-sold for ~14.4 keys

Dumped on scrap again, for 11 keys and some metal

https://backpack.tf/profiles/76561198174062770#!/compare/1539907200/1540166400

Also looks like it was bought from, and sold to, scrap again recently, given multiple entries in the item's history:

https://backpack.tf/item/5882960227