Sale 1:

Sold for Orbiting Planets Backbiter’s Billycock (11.5)

No outpost

Seller: https://backpack.tf/profiles/76561198313462058#!/compare/1525910400/1525996800

Buyer: https://backpack.tf/profiles/76561198043982289#!/compare/1525824000/1525910400

X = 12

Sale 2:

Sold for 11 keys

Seller: https://backpack.tf/profiles/76561198140287487#!/compare/1520380800/1520640000

Buyer: https://backpack.tf/profiles/76561198309102410#!/compare/1520380800/1520553600

X = 11

Sale 3:

Sold for 10 keys + 20 ref

Seller: https://backpack.tf/profiles/76561198304138933#!/compare/1524528000/1524614400

Buyer: https://backpack.tf/profiles/76561198067332644#!/compare/1524528000/1524614400

Untraceable, but bot.tf confirms: https://i.imgur.com/i4Alzp1.png

X = 11

Sale 4:

Quicksold for 10 keys + 15 ref

Seller: https://backpack.tf/profiles/76561198062749575#!/compare/1522540800/1522627200

Buyer: https://backpack.tf/profiles/76561198259369182#!/compare/1522540800/1522627200

X = 11

Sale 5:

Sold for 11 keys

Seller: https://backpack.tf/profiles/76561198259369182#!/compare/1522886400/1522972800

Buyer: https://backpack.tf/profiles/76561198142503739#!/compare/1522972800/1523491200

X = 11

Sale 6:

Quicksold for 10 keys + cheap items

Seller: https://backpack.tf/profiles/76561198090757260#!/compare/1524096000/1524182400

Buyer: https://backpack.tf/profiles/76561198126868108#!/compare/1523923200/1524096000

X = 10

Sale 7:

Quicksold for 10 keys

Seller: https://backpack.tf/profiles/76561198110699722#!/compare/1524528000/1524700800

Buyer: https://backpack.tf/profiles/76561198081081818#!/compare/1524614400/1524700800

X = 10

Sale 8:

Quicksold for 10 keys

Seller: https://backpack.tf/profiles/76561198101133806#!/compare/1525910400/1525996800

Buyer: https://backpack.tf/profiles/76561198265395903#!/compare/1525910400/1525996800

X = 10

Sale 9:

Sold for 10 keys

Seller: https://backpack.tf/profiles/76561198385940902#!/compare/1524700800/1524787200

Buyer: https://backpack.tf/profiles/76561198292089991#!/compare/1524700800/1524787200

Untraceable, but bot.tf confirms: https://i.imgur.com/i4Alzp1.png

X = 10

Sale 10:

Sold for 10 keys in ~2 days

Seller: https://backpack.tf/profiles/76561198305676157#!/compare/1525219200/1525305600

Buyer: https://backpack.tf/profiles/76561198267623899#!/compare/1525219200/1525478400

Bot.tf confirms: https://i.imgur.com/i4Alzp1.png

X = 10

Sale 11:

Sold for 9 keys + 17 ref

Seller: https://backpack.tf/profiles/76561198327078449#!/compare/1525737600/1525910400

Buyer: https://backpack.tf/profiles/76561198101133806#!/compare/1525737600/1525910400

Bot.tf confirms: https://i.imgur.com/i4Alzp1.png

X = 9.5

Sale 12:

Sold for Smoking Coupe D’isaster + 2 keys

No outpost

Seller: https://backpack.tf/profiles/76561198346506937#!/compare/1520899200/1521158400

Buyer: https://backpack.tf/profiles/76561198305666601#!/compare/1521072000/1521158400

Should end up being around 10. If it’s less, it’ll be excluded for being lower than quickbuyers.

Sale 13:

Sold with 2 keys + ticket (~0.5) for Orbiting Fire Airdog

Seller: https://backpack.tf/profiles/76561198044321640#!/compare/1520467200/1521331200

Buyer: https://backpack.tf/profiles/76561198158267107#!/compare/1521244800/1521331200

Should be used on the Airdog.

Sale 14:

Bulk for Stormy Festive Tree

Seller: https://backpack.tf/profiles/76561198034531012#!/compare/1525046400/1525132800

Buyer: https://backpack.tf/profiles/76561198411495266#!/compare/1525046400/1525132800

Sale 15:

Sold for 8 keys + 1 ref + unknown amount of items

http://www.tf2outpost.com/trade/29592815 - B/O of 11

Seller: https://backpack.tf/profiles/76561198158267107#!/compare/1521504000/1521590400

Buyer: https://backpack.tf/profiles/76561198345642253#!/compare/1521504000/1521590400

Several items on the buyer’s end were involved, but I can’t tell which ones exactly. Should most likely fit in the range anways.

Sale 16:

Bulk for ’72 Rock, Paper, Scissors

Seller: https://backpack.tf/profiles/76561198309102410#!/compare/1520640000/1521590400

Buyer: https://backpack.tf/profiles/76561198346506937#!/compare/1520208000/1520640000

Too bulky to use here comfortably, and too old to be used on the RPS.

Sale 17:

Bulk for something

Seller: https://backpack.tf/profiles/76561198278463603#!/compare/1522454400/1522540800

Buyer: https://backpack.tf/profiles/76561198062749575#!/compare/1522454400/1522540800

Sale 18:

Bulk for Hellfire Pardner’s Pompadour

Seller: https://backpack.tf/profiles/76561198065409820#!/compare/1523750400/1523923200

Buyer: https://backpack.tf/profiles/76561198258264645#!/compare/1523836800/1523923200

Sellers:

10 keys:

https://i.imgur.com/pBmBg9W.png

https://backpack.tf/item/1577184349

~10.3 keys:

https://i.imgur.com/Hh2lVOv.png

https://backpack.tf/item/1439136605

13 keys:

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

https://backpack.tf/item/5614105573

Sales at:

9.5

10 (5x)

11 (4x)

12

https://i.imgur.com/T5KGhhF.png - Quickbuyer at ~9.5, excluding 9.5.

Ignoring the fact that 10 “quicksold” multiple times, given the amount sales at 10, as well as the current sellers.

Excluding 12, as it isn’t very common, wasn’t pure, and is actually 11.5 without rounding.

Going with 10-11.