https://backpack.tf/profiles/76561198074518443#!/compare/1533772800/1533859200

Bulk, around buyers

https://backpack.tf/profiles/76561198074518443#!/compare/1534032000/1534118400

Added keys for Cmoon Jumper, rather bulkish

https://backpack.tf/profiles/76561198090412935#!/compare/1534032000/1534118400

With key for Blizz YWNN

https://backpack.tf/profiles/76561198090412935#!/compare/1534118400/1534204800

21 keys, IDs match (qs)

https://backpack.tf/profiles/76561198205153083#!/compare/1535068800/1535155200

https://backpack.tf/profiles/76561198061316177#!/compare/1534982400/1535155200

~17 keys

https://backpack.tf/profiles/76561198061316177#!/compare/1534982400/1535155200

Resold instantly for 20 keys, IDs match, item doesn't appear (qs)

https://backpack.tf/profiles/76561198218719943#!/compare/1535068800/1535155200

22 keys histories match (qs)

https://backpack.tf/profiles/76561198090671680#!/compare/1535760000/1536278400

Resold for 18

https://backpack.tf/profiles/76561198096044051#!/compare/1537401600/1537574400

25 keys

Summary:

Sales we got: 17, 18, 20, 21, 22, 25 + supportative YWNN sale (~18 keys)

Even though sales at 17-22 all were quicksales, they're too common point to leave that out. I'll roll with wider range as the sales are next to each other and it's hard to determinate an outlier