Sale 1:

https://backpack.tf/profiles/76561198341171690#!/compare/1562198400/1562284800

https://backpack.tf/profiles/76561198257064567#!/compare/1562198400/1562284800

https://bot.tf/stats/item?def=30045&q=5&ef=Sulphurous&craft=1&aus=0&ks=0&source=browser_script

Sold for 30 keys

Sale 2:

https://backpack.tf/profiles/76561198257064567#!/compare/1562198400/1562284800

https://backpack.tf/profiles/76561198050933686#!/compare/1562198400/1562284800

Bulk

Sale 3:

https://backpack.tf/profiles/76561198050933686#!/compare/1563321600/1563408000

https://backpack.tf/profiles/76561198446057077#!/compare/1561161600/1563408000

Sold for ~28 keys

Sale 4:

https://backpack.tf/profiles/76561198287684920#!/compare/1559174400/1559260800

https://backpack.tf/profiles/76561198798943946#!/compare/1559174400/1559260800

Sold for 3 keys,.... PE Sack might be part of it? can't prove.

Sale 5:

https://backpack.tf/profiles/76561198798943946#!/compare/1559865600/1559952000

https://backpack.tf/profiles/76561198830630023#!/compare/1559865600/1559952000

Sold for Miami Tyrantium + 10 keys

https://backpack.tf/suggestion/5d6725efd381721ec56b3464

Tyrantium mini is uncertain, strange situation. don't feel comfortable using such a mini to update any hat.

Will say that at minimum and maximum,(19 - 28), sale should fall in range.

Sale 6:

https://backpack.tf/profiles/76561198830630023#!/compare/1559952000/1560038400

https://backpack.tf/profiles/76561198277409359#!/compare/1559952000/1560038400

Sold for ~24 keys

Sale 7:

https://backpack.tf/profiles/76561198277409359#!/compare/1561334400/1561420800

https://backpack.tf/profiles/76561198387717978#!/compare/1561075200/1561420800

Sold for P Fetti Phantom(28.5)

Sale 8:

https://backpack.tf/profiles/76561198387717978#!/compare/1561075200/1561420800

https://backpack.tf/profiles/76561198134538517#!/compare/1561248000/1561420800

Untrace

Sale 9:

https://backpack.tf/profiles/76561198134538517#!/compare/1561593600/1561680000

https://backpack.tf/profiles/76561198021055079#!/compare/1561507200/1561593600

Sold for 24 keys

Total sales @:

24, 24, 28, 28.5, 30 keys

Taking 24 - 30 keys