Sale 1:

Sold for Blizzardy Storm Outdoorsman (Suggestion at 12.5) + 2 keys + some ref

http://www.tf2outpost.com/trade/29376147 - B/O of 16

Seller: https://backpack.tf/profiles/76561198126842344#!/compare/1511481600/1512086400

Buyer: https://backpack.tf/profiles/76561198060826499#!/compare/1512000000/1512086400

X = 15

Sale 2:

Sold for Orbiting Fire Sola Topi (Mini at 10 below) + 3 keys + Buds (~2)

http://www.tf2outpost.com/trade/29467540 - B/O of ~14

Seller: https://backpack.tf/profiles/76561198403536836#!/compare/1512691200/1512777600

Buyer: https://backpack.tf/profiles/76561198096256131#!/compare/1512691200/1512777600

X = 14 (Capped by B/O)

Sale 3:

Sold for Blizzardy Storm Samur-Eye (Mini at 12.5) + 1 key

http://www.tf2outpost.com/trade/29462682 - B/O of 15.5

Seller: https://backpack.tf/profiles/76561198060826499#!/compare/1512086400/1512172800

Buyer: https://backpack.tf/profiles/76561198161635287#!/compare/1512000000/1512172800

X = 14

Sale 4:

Sold for 13 keys

Seller: https://backpack.tf/profiles/76561198232041512#!/compare/1513728000/1513814400

Buyer: https://backpack.tf/profiles/76561198162213035#!/compare/1513641600/1513814400

X = 13

Sale 5:

Bulk for Frostbite Le Party Phantom

Seller: https://backpack.tf/profiles/76561198346118738#!/compare/1512345600/1512432000

Buyer: https://backpack.tf/profiles/76561198043991016#!/compare/1512345600/1512432000

Sale 6:

Sold for Green Confetti Milkman + 3 keys

http://www.tf2outpost.com/trade/29485407 - B/O of 14

Seller: https://backpack.tf/profiles/76561198162213035#!/compare/1515369600/1516406400

Buyer: https://backpack.tf/profiles/76561198262151031#!/compare/1516320000/1516406400

No other sales on the Milkman, can be used on that instead. (this’ll cap at the B/O, or at least fall into the range either way)

Sale 7:

Sold with 4 keys for Peace Sign Ol’ Snaggletooth and minor items

Seller: https://backpack.tf/profiles/76561198384650458#!/compare/1512172800/1512345600

Buyer: https://backpack.tf/profiles/76561198403536836#!/compare/1512259200/1512345600

Was used on the Snaggle. Excluding.

Orbiting Fire Sola Topi Mini:

Sold for 10 keys

Seller: https://backpack.tf/profiles/76561198097827486#!/compare/1516060800/1516838400

Buyer: https://backpack.tf/profiles/76561198103817226#!/compare/1516752000/1516838400

X = 10

Blizzardy Outdoorsman:

https://backpack.tf/suggestion/5a76c0c6cf6c757f215e248d

Blizzardy Samur-Eye Mini:

https://backpack.tf/suggestion/5a661ce5cf6c750e987c49bb (refer to my comment)

Sellers:

15 keys:

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

https://backpack.tf/item/1350163643

https://backpack.tf/item/775491539

Sales at:

13

14 (2x)

15

Going with 13-15.