I suggested the Burning Beanie at 34 https://backpack.tf/suggestion/697b1de0f24b4bc4f5008b5a so this one is at 620 with rounding.

400 keys + eeire orb fire cosa nostra (188) + calm snowfall burning beanie(34) = 622 round down to 620

https://backpack.tf/profiles/76561198083063978#!/compare/1767052800/1767139200

All other recent sales are either quicksells or brokering ( i contacted the respective owners and asked them):

Laurennntiu -> Merry Kritzmas was for Kritzmas to broker

https://backpack.tf/profiles/76561198083063978#!/compare/1764979200/1765152000

https://backpack.tf/profiles/76561198261483133#!/compare/1764892800/1764979200

bl4ckwing -> Kolt was a buying backpack cash trade so birdcage was valued at quicksale price

https://backpack.tf/profiles/76561198817864089#!/compare/1766016000/1766793600