Circling Heart VIntage Tyrolean

Sale #1 = 70 keys

https://backpack.tf/profiles/76561198061489334#!/compare/1546214400/1546300800

Pure.

Sale #2 = 72 keys

Jan 9, 2019

https://marketplace.tf/items/101;5;u19

$126 / 1.75

$1.75 = price of keys on Jan 9, 2019

Sale #3 = 71 keys

Oct 18, 2018

https://marketplace.tf/items/101;5;u19

$125 / 1.77 = 70.62 (rounding to 71)

This sale is almost outdated, and also not completely sure on the price of keys on Oct 18, but it still supports the range.

Sale #4 = not using

https://backpack.tf/profiles/76561198061489334#!/compare/1543190400/1543276800

Better to be used on Burning Geisha

Sale #5 = not using

https://backpack.tf/profiles/76561198021691101#!/compare/1539302400/1539388800

Better used on Merryweather

Final Price = 70-72 keys