And there it shows..

Sales

Sale 1: Sold for 100 keys

https://backpack.tf/profiles/76561197966756586#!/compare/1599696000/1599782400

https://backpack.tf/profiles/76561198080782829#!/compare/1599609600/1600041600

Sale 2: Added 10 keys for GBH Ushanka

https://backpack.tf/profiles/76561198080782829#!/compare/1600041600/1600732800

https://backpack.tf/profiles/76561198232041512#!/compare/1600646400/1600732800

https://gyazo.com/984681a99f9a91193bbfd431b7a56b61

Only other sale for the Ushanka was 55~. This would be low for this hat considering buyers at 78+.

55 - 10 = 45 keys

Looks like the other sale was a backpack buy.

https://backpack.tf/item/6262783764

Marketplace

https://marketplace.tf/items/tf2/30314;5;u90

Nothing recent.

Classifieds

https://gyazo.com/9da4ee9139784fc2a75a3ebdd256a016

Summary

Sales at 45 and 100.

Conclusion

45 is under buyers, excluding.

Going with 100 here.