Time to edit ran out before I could edit with complete information:

Thanks to PlusEighteen for the info! And screenshots!

Burnin' up.

Sale 1:

https://marketplace.tf/items/208;15;u701;w3;pk205;kt-2

Sold for 80 USD

Keys at 1.93 USD

Total is 41.45 keys

Taking 41 flat.

Sale 2:

https://steamcommunity.com/market/pricehistory/?country=US&currency=1&appid=440&market_hash_name=Unusual%20Specialized%20Killstreak%20Fire%20Glazed%20Flame%20Thrower%20%28Field-Tested%29

https://imgur.com/vFyC5Ol

Sold for 645.74 CAD, or ~484 .38 CAD at conversion*

Keys at 3.12 CAD, or 2.34 USD

Total is 206.97 keys from CAD, 207 USD EXACTLY(WOW)

Calling 41 an outlier, taking 207 flat.

*

Taking a look at the screenshot, the Seller received 421.75 USD

421.75 /484.38 = 0.87, which is roughly the price after SCM tax.

Therefore, 484.38 is close to the correct price.