Sale 1:

Sold for Haunted Phantasm Jr Belgian Detective (Mini at 53 below)

http://www.tf2outpost.com/trade/29203575 - No B/O, nothing cached on the classifieds

Seller: https://backpack.tf/profiles/76561198018101085#!/compare/1499040000/1499126400

Buyer: https://backpack.tf/profiles/76561198031291069#!/compare/1499126400/1499299200

X = 53

Sale 2: – Credit to Waffler

Sold for 50 keys

Seller: https://backpack.tf/profiles/76561198222561920#!/compare/1500163200/1500336000

Buyer: https://backpack.tf/profiles/76561198081213486#!/compare/1500249600/1500422400

http://imgur.com/a/ThQPL

X = 50

Sale 2:

Sold for ~40.5 keys in Strange Unusual Wing Men

No outpost

Seller: https://backpack.tf/profiles/76561198112612121#!/compare/1495411200/1495497600

Buyer: https://backpack.tf/profiles/76561198018101085#!/compare/1495411200/1495497600

Two of these are outdated, though it’s unlikely that it’ll affect the range here.

X = ~41

Sale 3:

Sold with 2 keys for Frostbite Conquistador (40)

http://www.tf2outpost.com/trade/29272404 - B/O of 50

Seller: https://backpack.tf/profiles/76561198253093948#!/compare/1500076800/1500163200

Buyer: https://backpack.tf/profiles/76561198222561920#!/compare/1500076800/1500163200

X = 38

Sale 4:

Bulk for Green Black Hole Sergeant’s Drill Hat

Seller: https://backpack.tf/profiles/76561198031291069#!/compare/1499817600/1499904000

Buyer: https://backpack.tf/profiles/76561198253093948#!/compare/1499731200/1499817600

Sale 5:

Bulk for Peace Sign Co-Pilot

Seller: https://backpack.tf/profiles/76561198081213486#!/compare/1500508800/1500595200

Buyer: https://backpack.tf/profiles/76561198086973403#!/compare/1500422400/1500595200

Phantasm Belgian Mini:

Sale 1:

Sold for Terror-Watt Pyromancer’s Mask (68.5) + <4 keys in items

http://www.tf2outpost.com/trade/28879084 - Deleted B/O, nothing cached

Seller: https://backpack.tf/profiles/76561198153402711#!/compare/1496361600/1496448000

Buyer: https://backpack.tf/profiles/76561198031291069#!/compare/1496188800/1496448000

X = 72

Sale 2:

Sold with Slumber Titanium Pillar (24) for Strange Starstorm Slumber Brown Bomber (81)

http://i.imgur.com/Qkf0sas.png - B/O of 53

Seller: https://backpack.tf/profiles/76561198018101085#!/compare/1501891200/1501977600

Buyer: https://backpack.tf/profiles/76561198149211008#!/compare/1501891200/1501977600

X = 53 (Capped by B/O)

Gonna exclude the sale at 72, because it would be much lower with a B/O. Taking 53.

Sales at:

38

~41

50

53

No current sellers.

Rounding 53 to 55, and 38 to 40.

Going with 40-55.