Sale 1:

Sold for 13 keys + 23 ref

Seller: https://backpack.tf/profiles/76561198304138933#!/compare/1524787200/1524873600

Buyer: https://backpack.tf/profiles/76561198302093156#!/compare/1524873600/1525046400

Bot.tf confirms: https://i.imgur.com/2hMBd5x.png

X = 14

Sale 2:

Sold for 13 keys + 30 ref

Seller: https://backpack.tf/profiles/76561198304138933#!/compare/1522281600/1522368000

Buyer: https://backpack.tf/profiles/76561198374540031#!/compare/1521676800/1522368000

X = 14

Sale 3:

Sold for 13 keys + 26 ref

Seller: https://backpack.tf/profiles/76561198327078449#!/compare/1523836800/1523923200

Buyer: https://backpack.tf/profiles/76561198140550076#!/compare/1523836800/1525737600

Bot.tf confirms: https://i.imgur.com/2hMBd5x.png

X = 14

Sale 4:

Sold for 14 keys

Seller: https://backpack.tf/profiles/76561198131238686#!/compare/1524873600/1524960000

Buyer: https://backpack.tf/profiles/76561198370198630#!/compare/1524441600/1524960000

X = 14

Sale 5:

Sold to a bot for 13 keys

Seller: https://backpack.tf/profiles/76561198133856250#!/compare/1524268800/1524960000

Buyer: https://backpack.tf/profiles/76561198304138933#!/compare/1524787200/1524873600

Bot.tf confirms: https://i.imgur.com/2hMBd5x.png

X = 13

Sale 6:

Sold for 12 keys + 24 ref

Seller: https://backpack.tf/profiles/76561198385940902#!/compare/1526601600/1526688000

Buyer: https://backpack.tf/profiles/76561198177158446#!/compare/1526515200/1526688000

Bot.tf confirms: https://i.imgur.com/2hMBd5x.png

X = 13

Sale 7:

Sold to a bot for 13 keys

Seller: https://backpack.tf/profiles/76561198360498027#!/compare/1523664000/1523750400

Buyer: https://backpack.tf/profiles/76561198304138933#!/compare/1523664000/1523750400

Bot.tf confirms: https://i.imgur.com/2hMBd5x.png

X = 13

Sale 8:

Sold for 13 keys

Seller: https://backpack.tf/profiles/76561198304138933#!/compare/1526688000/1526774400

Buyer: https://backpack.tf/profiles/76561198159168420#!/compare/1526601600/1526774400

X = 13

Sale 9:

Sold to a bot for 12 keys + 5 ref

https://backpack.tf/item/1330524487 - Seller can’t be traced.

Buyer: https://backpack.tf/profiles/76561198385940902#!/compare/1525564800/1525651200

Bot.tf confirms: https://i.imgur.com/2hMBd5x.png

X = 12

Sale 10:

Sold for 11 keys + 19 ref

Seller: https://backpack.tf/profiles/76561198059021831#!/compare/1526601600/1526688000

Buyer: https://backpack.tf/profiles/76561198043939870#!/compare/1526601600/1526688000

X = 12

Sale 11:

Sold to a bot for 11 keys + 33 ref

Seller: https://backpack.tf/profiles/76561198282515057#!/compare/1520553600/1522022400

Buyer: https://backpack.tf/profiles/76561198327078449#!/compare/1521936000/1522022400

Bot.tf confirms: https://i.imgur.com/2hMBd5x.png

X = 12

Sale 12:

Sold for 10 keys

Seller: https://backpack.tf/profiles/76561198317418604#!/compare/1526515200/1526601600

Buyer: https://backpack.tf/profiles/76561198059021831#!/compare/1526515200/1526601600

Bot.tf confirms: https://i.imgur.com/2hMBd5x.png

X = 10

Sale 13:

Sold with ~2 keys in items for Blizzardy Storm Glengarry Bonnet

Seller: https://backpack.tf/profiles/76561198370198630#!/compare/1525046400/1525219200

Buyer: https://backpack.tf/profiles/76561198393247820#!/compare/1525132800/1525219200

Should be used on the Bonnet.

Sale 14:

Sold with 3 keys for Steaming Company Man

Seller: https://backpack.tf/profiles/76561198393247820#!/compare/1525910400/1525996800

Buyer: https://backpack.tf/profiles/76561198160856661#!/compare/1525910400/1525996800

Should be used on the Company Man.

Sellers:

13 keys:

https://i.imgur.com/f1bAltf.png

https://backpack.tf/item/1351370899

~13.5 keys:

https://i.imgur.com/5nkmGgX.png

https://backpack.tf/item/1128916214

Sales at:

10

12 (3x)

13 (4x)

14 (4x)

10 is an outlier, excluding.

Will exclude 12, as is doesn’t seem TOO common, I guess.

Going with 13-14.