Update!

Sale 1: https://backpack.tf/profiles/76561198095022965#!/compare/1598400000/1598486400

https://backpack.tf/profiles/76561198060321939#!/compare/1598400000/1598486400

85 pure. My purchase was a quickbuy.

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Additional by Xergoyf:

Looks like stn sold for 64

https://backpack.tf/profiles/76561198311498888#!/compare/1599350400/1599436800

https://backpack.tf/profiles/76561198053912513#!/compare/1599177600/1599436800

5 low-tiers in the obtained together were not involved.

Buyer has re-listed on mp for ~75 and recent sold for that amount.

https://marketplace.tf/items/tf2/30128;5;u14

$140 / $1.87 = 74.87 keys

Sales at 53.5 (buy order)/54/64/75/85, I would go 64 - 75 for a conservative drop.

64-75 it is!