Sale 1:

Sold for Orbiting Fire Law (50.5)

Seller: https://backpack.tf/profiles/76561198083078865#!/compare/1538092800/1538179200

Buyer: https://backpack.tf/profiles/76561198312583107#!/compare/1538092800/1538179200

https://backpack.tf/item/6672655582

X = 51

Sale 2:

Sold for 45 keys

Seller: https://backpack.tf/profiles/76561198074971373#!/compare/1534809600/1534896000

Buyer: https://backpack.tf/profiles/76561198095909405#!/compare/1534809600/1534896000

https://backpack.tf/item/6145416567

X = 45

Sale 3:

Sold for 35 keys + ~3 keys in taunts

Seller: https://backpack.tf/profiles/76561198163598025#!/compare/1539475200/1539820800

Buyer: https://backpack.tf/profiles/76561198044547547#!/compare/1539388800/1539475200

https://backpack.tf/item/3532419751

X = 38

Sale 4:

Sold for Planets Brotherhood of Arms (In-date at 33, seller at 30, taking 31.5) + Strange Bubbling Tundra Top + Strange Spec. KS Huntsman (~5.5)

Seller: https://backpack.tf/profiles/76561198056793444#!/compare/1536624000/1536710400

Buyer: https://backpack.tf/profiles/76561198083078865#!/compare/1536624000/1536710400

https://backpack.tf/item/6672655582

No mini available on the Tundra. If we were to take current price, it would end up being around 55, which is fairly high compared to sellers.

Sale 5:

Sold with 8 keys for DBD Anger

Seller: https://backpack.tf/profiles/76561198095909405#!/compare/1534896000/1535673600

Buyer: https://backpack.tf/profiles/76561198232041512#!/compare/1535587200/1535673600

https://backpack.tf/item/6145416567

Can be used on the Anger.

Worth nothing that the rest of the history after this was either gambled or scrap.tf.

Sale 6:

Sold on SCM

Seller: https://backpack.tf/profiles/76561198113222986#!/compare/1534982400/1535068800

Buyer: https://backpack.tf/profiles/76561198136883260#!/compare/1534982400/1535155200

https://backpack.tf/item/6784233646

Sale 7:

Untraceable, bought from scrap

Seller: https://backpack.tf/profiles/76561198135388328#!/compare/1534550400/1534636800

Buyer: https://backpack.tf/profiles/76561198074971373#!/compare/1534550400/1534636800

https://backpack.tf/item/6145416567

Sale 8:

Sold for Duped Orbiting Fire Rack (See mini below)

Seller: https://backpack.tf/profiles/76561198044547547#!/compare/1539820800/1540080000

Buyer: https://backpack.tf/profiles/76561198070773303#!/compare/1539820800/1540166400

https://backpack.tf/item/3532419751

Sale 9:

Untraceable

Seller: https://backpack.tf/profiles/76561198132329942#!/compare/1536710400/1536969600

Buyer: https://backpack.tf/profiles/76561198163598025#!/compare/1536278400/1536969600

https://backpack.tf/item/3532419751

Duped Orbiting Fire Rack Mini:

Sold for Beams Pith Helm (Mini at 50 below) + 7 keys

Seller: https://backpack.tf/profiles/76561198309838525#!/compare/1536710400/1536796800

Buyer: https://backpack.tf/profiles/76561198070773303#!/compare/1536710400/1536796800

https://backpack.tf/item/1842043066

This is the only mini I could get, and considering several sellers, including clean ones at 50 keys, this is gonna be high. Would be better off excluding this one.

Beams Pith Helm Mini:

Sold for Pro. KS Aus Rocket Launcher (~50)

https://backpack.tf/profiles/76561198309838525#!/compare/1537574400/1537660800

Sellers:

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

https://i.imgur.com/t9RkO4v.png

https://backpack.tf/item/6145416567 - 44 keys

https://backpack.tf/item/6672655582 - 50 keys

https://backpack.tf/item/3532419751 - 50 keys

https://backpack.tf/item/6784233646 - 65 keys

https://backpack.tf/item/6817825708 - 90 keys

https://backpack.tf/item/6181967389 - 120 keys

Sales at:

38

45

51

Going with 38-51.