This must be by far the best hat for spycrabbing, it's a crab and it's really affordable :p

History 1: https://backpack.tf/item/10246720377

Untraceable:

https://backpack.tf/profiles/76561198398826004#!/compare/1622246400/1622592000

https://backpack.tf/profiles/76561198130682435#!/compare/1622505600/1622592000

History 2: https://backpack.tf/item/9243094077

One of the Mannco.Store sales

Untraceable/Bulk:

https://backpack.tf/profiles/76561198032040642#!/compare/1621814400/1622332800

https://backpack.tf/profiles/76561197986669128#!/compare/1621641600/1621814400

Untraceable:

https://backpack.tf/profiles/76561197986669128#!/compare/1621641600/1621814400

https://backpack.tf/profiles/76561198024452858#!/compare/1621728000/1621814400

Untraceable:

https://backpack.tf/profiles/76561198024452858#!/compare/1621900800/1621987200

https://backpack.tf/profiles/76561198419584303#!/compare/1621814400/1621987200

Untraceable:

https://backpack.tf/profiles/76561198419584303#!/compare/1621814400/1621987200

https://backpack.tf/profiles/76561198100484031#!/compare/1621900800/1621987200

Mannco.Store: https://mannco.store/item/440-massed-flies-unusual-crabe-de-chapeau

March 29: $16.92/1.94=8.72 ~8.5 keys

May 23: $16.63/1.77=9.4 ~9.5 keys

There's an unsold at $16.51 (16.51/1.71=9.65 keys)

Unsold on Marketplace.tf: https://marketplace.tf/items/tf2/31109;5;u12

18.99/1.9=9.99 keys

Taking 8.5-9.5 keys here