Mini for Phosphorus Brown Bomber. Thanks to AJ for helping figure out the range.

Taking 3 months due to lack of sales.

Sale 1:

Can't find item history.

https://marketplace.tf/items/tf2/31162;5;u3003

April 28th - $35.99 USD

Keys were $2.01 that day, so 35.99 / 2.01 = 17.9, rounding to 18 keys.

Sale 2:

https://backpack.tf/item/9711886820

https://backpack.tf/profiles/76561198823361235#!/compare/1618444800/1618704000

https://backpack.tf/profiles/76561198823361235#!/compare/1618444800/1618704000

Untrace, probably a quicksell anyways.

Sale 3:

https://backpack.tf/item/9711886820

https://backpack.tf/profiles/76561199084784906#!/compare/1618617600/1618704000

https://backpack.tf/profiles/76561198116002030#!/compare/1618617600/1618704000

Untrace

Sale 4:

https://backpack.tf/item/9711886820

https://backpack.tf/profiles/76561198116002030#!/compare/1621296000/1621382400

https://backpack.tf/profiles/76561198850274253#!/compare/1621296000/1621382400

Bulk

Sale 5:

https://backpack.tf/item/9821158161

https://backpack.tf/profiles/76561198159230350#!/compare/1615939200/1616630400

https://backpack.tf/profiles/76561199103801420#!/compare/1616544000/1616630400

13 pure plus 6 ref, rounding to 13.

Sale 6:

https://backpack.tf/item/9821158161

https://backpack.tf/profiles/76561199103801420#!/compare/1618099200/1618185600

https://backpack.tf/profiles/76561197968185455#!/compare/1617840000/1618185600

14 Pure, key history matches on one or two keys.

Sale 7:

https://backpack.tf/item/9821158161

https://backpack.tf/profiles/76561197968185455#!/compare/1620691200/1620777600

https://backpack.tf/profiles/76561198280693486#!/compare/1620604800/1620691200

Untrace

Sale 8:

https://backpack.tf/item/9821158161

https://backpack.tf/profiles/76561198280693486#!/compare/1620691200/1620864000

https://backpack.tf/profiles/76561198080179568#!/compare/1620691200/1620777600

Bulk/untrace

Sale 9:

https://backpack.tf/item/9538654322

https://backpack.tf/profiles/76561198053720151#!/compare/1616889600/1616976000

https://backpack.tf/profiles/76561198375673085#!/compare/1616889600/1616976000

Bulk, using for the brown bomber.

Sale 10:

https://backpack.tf/item/9538654322

https://backpack.tf/profiles/76561198053720151#!/compare/1616889600/1616976000

https://backpack.tf/profiles/76561198080179568#!/compare/1616889600/1616976000

Untrace

Gladiator.tf Sales (last 30 days):

https://gladiator.tf/sales?item=Holy%20Grail%20Taunt:%20The%20Fist%20Bump&at=2021-06-12T21:51:34.475Z

1 @ 18 keys

1 @ 21 keys

Summary of Sales:

13, 14, 18, 18, 21

21 is def high, 13 is low, was less than 4 refined above buy orders on the date that sale happened and current buy orders are just about at 13. Excluding both.

Taking 14-18 keys.