Time for some updates:

Marketplace.tf

https://marketplace.tf/items/146;5;u13

Key price based on http://manicbot.me/keyprice.txt

199.99$ / 1.97$ = 101.5 keys = 102 keys

Backpack TF

Sale 1:

Sold with 8 keys for a Sunbeams Tyrant's Helm (117.5 keys)

https://backpack.tf/profiles/76561198026563302#!/compare/1525132800/1525219200

https://backpack.tf/profiles/76561198114402400#!/compare/1525132800/1525219200

117.5 keys - 8 keys = 109.5 keys = 110 keys

Sale 2:

1 for 1 for a Burning Flames Cosa Nostra Cap

https://backpack.tf/profiles/76561198114402400#!/compare/1527292800/1527379200

https://backpack.tf/profiles/76561198058056068#!/compare/1526256000/1527638400

Feels like this is better used for the Cosa Nostra Cap.

Sales: 102 / 110

Taking 100-110 keys.

Provide supplemental proof, counter proof or report recent sales for this hat in the comments!

Have a nice day!