Sale 1:

Sold for ~9.5 keys in items

Seller: https://backpack.tf/profiles/76561198054260579#!/compare/1524096000/1524528000

Buyer: https://backpack.tf/profiles/76561198001800462#!/compare/1523491200/1524182400

X = 9.5

Sale 2:

Sold for 9 keys

Seller: https://backpack.tf/profiles/76561198292242424#!/compare/1522886400/1522972800

Buyer: https://backpack.tf/profiles/76561198266317934#!/compare/1522972800/1523750400

Seller’s end shows 15 keys, but 6 keys don’t seem to match, and the ID’s are rather far apart, so I highly doubt that they were involved.

X = 9

Sale 3:

Bot.tf sale at 9 keys

Seller: https://backpack.tf/profiles/76561198386441509#!/compare/1524355200/1524441600

Can’t identify buyer, looks like it went through some gambling or something immediately after purchase - https://backpack.tf/item/5662094250

X = 9

Sale 4:

Sold with ~2 keys in items for Cloud 9 Infernal Impaler

Seller: https://backpack.tf/profiles/76561198129499386#!/compare/1523836800/1523923200

Buyer: https://backpack.tf/profiles/76561198089703403#!/compare/1523836800/1523923200

Gonna be a large outlier here, excluding.

Sale 5:

Bulk for Green Black Hole Steel Shako

Seller: https://backpack.tf/profiles/76561198452735539#!/compare/1522627200/1522886400

Buyer: https://backpack.tf/profiles/76561198405692100#!/compare/1522800000/1522886400

Sale 6:

Sold for a bunch of painted items and stuff

Seller: https://backpack.tf/profiles/76561198089703403#!/compare/1523836800/1523923200

Buyer: https://backpack.tf/profiles/76561198196459527#!/compare/1523923200/1524009600

Not using this sale.

Sellers:

14 keys:

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

https://backpack.tf/item/5787682634

SCM: (Taking keys as $2.47)

https://i.imgur.com/cmZMfV8.png - (only the first 6 are important)

$23 (~9.31 keys)

$23.74 (~9.61 keys)

$26.71 (~10.81 keys)

$27.45 (~11.11 keys)

$28.58 (~11.57 keys)

$30.70 (~12.43 keys)

Sales at:

9 (2x)

9.5

Going with 9-9.5.

https://backpack.tf/profiles/76561198386083901#!/compare/1524873600/1525132800

https://backpack.tf/profiles/76561198370808682#!/compare/1525046400/1525132800

sold for 7 keys

lower than quickbuyers