Buyers side:

https://backpack.tf/profiles/76561198131633162#!/compare/1728950400/1729036800

More sales:

Sold for $99.99 on Marketplace (~55 Keys)

https://marketplace.tf/items/tf2/920;5;u7

Sold for 45 Keys

https://backpack.tf/profiles/76561198066501392#!/compare/1725062400/1725235200

Sold for 41 Keys

https://backpack.tf/profiles/76561197960278017#!/compare/1726012800/1726185600

Sold for 33 Keys?

https://backpack.tf/profiles/76561199193412191#!/compare/1727222400/1727308800

I don't think this sale's complete.

Sold for 39 Keys

https://backpack.tf/profiles/76561198021055079#!/compare/1720656000/1721001600

Sold for 28 Keys

https://backpack.tf/profiles/76561198306870587#!/compare/1721692800/1721779200

Sold for 41 Keys

https://backpack.tf/profiles/76561198311498888#!/compare/1722902400/1722988800

Sold for a Pro KS Scattergun Kit (~40 Keys)

https://backpack.tf/profiles/76561198099863423#!/compare/1722902400/1722988800

Sold for 37 Keys

https://backpack.tf/profiles/76561198453530349#!/compare/1723680000/1728691200

Sold for 46 Keys

https://backpack.tf/profiles/76561199746241974#!/compare/1728691200/1728777600

Lots of lower sales here, which on paper would be countered by buyers. But, given the high amount of low sales here, they can't all be excluded. 41-55 should be a more appropiate range here.