resugg from: https://backpack.tf/suggestion/5ffde942ee5cf328291c99e2 Thanks Suffle Spy and Offline for their helps!

Sale 1)

https://backpack.tf/item/8816930301

https://mannco.store/item/21135

$28.89 on mannco.store

$28.89 / $1.86 = 15.53 key / 8 January 2021

Rounded 16.

https://backpack.tf/item/8816930301

Sale 2)

https://backpack.tf/profiles/76561198341781664#!/compare/1610755200/1610841600 - Looks like the buyer in that sale dumped it for 10 Keys

Sale 3)

https://backpack.tf/profiles/76561198099098829#!/compare/1611014400/1611100800 - Sold for 12 Keys

Sale 4)

https://backpack.tf/profiles/76561198801168467#!/compare/1610582400/1610755200

https://backpack.tf/profiles/76561198341781664#!/compare/1610323200/1610755200

Added 6 keys for Aus. Tomislav Basic KS. Tomislav is closer to 22 Keys, so that sale will also be 16 Keys. (excluding)

12 to 16 Keys will work here, excluding 10 and the Tomislav sale as the person dumped the Globetrotter for much less than they paid.

Total Sales:

10 (excluding)

12

16