Sale 1:

Sold with 3 keys for Strange Pro. KS Rocket Launcher (14)

Seller: https://backpack.tf/profiles/76561198174009537#!/compare/1548633600/1548720000

Buyer: https://backpack.tf/profiles/76561198255181725#!/compare/1548633600/1548806400

https://backpack.tf/item/278087372

X = 11

Sale 2:

Sold for 11 keys

Seller: https://backpack.tf/profiles/76561198080179568#!/compare/1549756800/1549843200

Buyer: https://backpack.tf/profiles/76561198172569514#!/compare/1549843200/1549929600

https://backpack.tf/item/278087372

X = 11

Sale 3:

Sold for 10 keys + 24 ref

Seller: https://backpack.tf/profiles/76561198337734785#!/compare/1550016000/1550102400

Buyer: https://backpack.tf/profiles/76561198357553257#!/compare/1550016000/1550102400

https://backpack.tf/item/158385119

X = 11

Sale 4:

Sold for 10 keys + 10 ref

Seller: https://backpack.tf/profiles/76561198337734785#!/compare/1547337600/1547424000

Buyer: https://backpack.tf/profiles/76561198155418796#!/compare/1547251200/1547424000

https://backpack.tf/item/3799764656

X = 10

Sale 5:

Sold to a quickbuyer for 9 keys + ~0.5 keys in metal

Seller: https://backpack.tf/profiles/76561198336843743#!/compare/1550707200/1550880000

Buyer: https://backpack.tf/profiles/76561198080179568#!/compare/1550793600/1550880000

https://backpack.tf/item/158385119

X = 9.5

Other Sales:

https://backpack.tf/item/3799764656 (#1 & #2)

https://backpack.tf/item/278087372 (#3 & #4)

https://backpack.tf/item/158385119 (#5-9)

#1

Untraceable

https://backpack.tf/profiles/76561198155418796#!/compare/1553644800/1554508800

https://backpack.tf/profiles/76561198126011754#!/compare/1552953600/1553990400

#2

Untraceable

https://backpack.tf/profiles/76561198126011754#!/compare/1554336000/1554422400

https://backpack.tf/profiles/76561198210845757#!/compare/1553904000/1554422400

#3

Untraceable

https://backpack.tf/profiles/76561198384349249#!/compare/1547164800/1547251200

https://backpack.tf/profiles/76561198279739801#!/compare/1547164800/1547251200

some items match

#4

Sold for 9 keys + an untraceable amount of metal

https://backpack.tf/profiles/76561198255181725#!/compare/1548806400/1549065600

https://backpack.tf/profiles/76561198080179568#!/compare/1548979200/1549065600

I’d assume it sold for 9 keys + half a key in metal given current buyers, then the seller turned their ref into a key

#5

Sold for Cloud 9 Tsarboosh

https://backpack.tf/profiles/76561198044854333#!/compare/1547683200/1547856000

https://backpack.tf/profiles/76561198119149660#!/compare/1547510400/1547596800

Can be used on the Tsarboosh.

#6

Untraceable

https://backpack.tf/profiles/76561198119149660#!/compare/1548460800/1548547200

https://backpack.tf/profiles/76561198301336678#!/compare/1548460800/1548547200

18 keys match so it’s probably bulk for pure.

#6

Sold for Nuts Practicioner + cheap items

https://backpack.tf/profiles/76561198301336678#!/compare/1548460800/1548547200

https://backpack.tf/profiles/76561198278678961#!/compare/1548374400/1548547200

Using on practitioner.

#7

Untraceable

https://backpack.tf/profiles/76561198278678961#!/compare/1548547200/1548633600

https://backpack.tf/profiles/76561198226262240#!/compare/1548547200/1548720000

#8

Untraceable

https://backpack.tf/profiles/76561198226262240#!/compare/1548547200/1548720000

https://backpack.tf/profiles/76561198337734785#!/compare/1548460800/1548547200

#9

Untraceable

https://backpack.tf/profiles/76561198357553257#!/compare/1550448000/1550966400

https://backpack.tf/profiles/76561198336843743#!/compare/1550707200/1550880000

Sellers:

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

https://backpack.tf/item/158385119 - 11 keys

Sales at:

9.5

10

11 (3x)

9.5 went to a buy order, excluding 9.5.

Going with 10-11.