Item 1:

https://backpack.tf/item/13103779218

Seller:

https://backpack.tf/profiles/76561198066119670#!/compare/1736553600/1736640000

Buyer:

https://backpack.tf/profiles/76561198050412790#!/compare/1736553600/1736640000

Seller provided info:

https://imgur.com/a/IHOy2v2

shows 45 keys

Item 2:

https://backpack.tf/item/11929933621

Sale 1:

Seller:

https://backpack.tf/profiles/76561198854577441#!/compare/1732579200/1735862400

Buyer:

https://backpack.tf/profiles/76561198069302272#!/compare/1732406400/1732579200

Bulk for Haunted Ghosts Blighted Beak

Sale 2:

Seller:

https://backpack.tf/profiles/76561198069302272#!/compare/1733443200/1733702400

Buyer:

https://backpack.tf/profiles/76561198229964884#!/compare/1733529600/1733702400

bulk, showing on buyer's side

Sale 3:

Seller:

https://backpack.tf/profiles/76561198229964884#!/compare/1733702400/1733875200

Buyer:

https://backpack.tf/profiles/76561199232380670#!/compare/1733788800/1733875200

ID: 15221752438 --> 29 ref

Buyer's side shows 20 keys 69 ref, below buyers so safe to ignore.

Sale 4:

Seller:

https://backpack.tf/profiles/76561199232380670#!/compare/1735257600/1735344000

Buyer

https://backpack.tf/profiles/76561198159266276#!/compare/1731110400/1735862400

ID:15292196547 --> 30 keys match

On buyer's side it shows 31 keys left, nothing else moved.

Row 1, Key 8 doesn't match though. https://backpack.tf/item/12806620088 --> counting as 30

To mention:

One sold on steam community market for ~355$, see these suggestions:

https://backpack.tf/suggestion/6783f2c727773a019d0bdf33

https://backpack.tf/suggestion/6783fc06f08427a16b02c7b6

I will simply ignore this sale since it is a clear outlier.

Sale at 30, 45 Taking 30-45 keys.