Sold for $1000 paypal on Dec 25:

https://i.ibb.co/cbPjqwK/Pfetti-proof-1.png

https://backpack.tf/profiles/76561198026744290#!/compare/1608854400/1608940800

Paypal key prices from Dec 22nd to 28th:

Dec 22:

Nothing

Dec 23:

https://forums.backpack.tf/topic/76850-b-keys-173-each/ - no apparent sales

https://forums.backpack.tf/topic/76805-julia-is-buying-keys-182-usa/ - Sold at $1.82

Dec 24:

Nothing

Dec 25:

https://forums.backpack.tf/topic/76862-buying-tf2-keys-with-paypal-for-181-usd-or-%E2%82%AC146-each/ - no apparent sales

https://forums.backpack.tf/topic/76866-wtb-keys-155-ea-for-crypto/ - no apparent sales

https://forums.backpack.tf/topic/76871-buying-keys-180-each-special-keysmetal-tools-possible-options-too-paypal-eu/ - no key sales within period

Dec 26:

https://forums.backpack.tf/topic/76877-willing-to-buy-tf2-keys-via-paypal-from-usd-165-to-high/ - no apparent sales

https://forums.backpack.tf/topic/76882-keys-for-175-have-300/ - Sold at $1.75

https://forums.backpack.tf/topic/76883-buying-keys-165/ - no apparent sales

https://forums.backpack.tf/topic/76884-selling-keys-154%E2%82%ACkey/ - no apparent sales

Dec 27:

https://forums.backpack.tf/topic/76894-keys-for-175/ - Sold at $1.75 (based on trust left here dating to Dec 27 indicating keys sold: https://backpack.tf/trust/76561198064105712?page=2&) ((NOTE: This person also had a thread buying keys at $1.65 the day before and with apparent sales dating to that time, but $1.65 looks low.))

https://forums.backpack.tf/topic/76896-blazexth3rm4lx-is-buying-keys-for-180-usd-paypal/ - Sold at $1.80 (based on trust left here dating to Dec 27 indicating keys sold: https://backpack.tf/trust/76561198017901187)

https://forums.backpack.tf/topic/76898-buying-keys-at-180-usd-160-cash-rep-bulk-purchasing/ - no apparent sales

https://forums.backpack.tf/topic/76899-buying-tf2-keys-for-182-usd/ - Sold at $1.82

Dec 28:

https://forums.backpack.tf/topic/76903-buying-keys-174-usd-paypal/ - no apparent sales

https://forums.backpack.tf/topic/76909-b-keys-185-each/ - no apparent sales

Key sales from $1.75 to $1.82, averaging out to $1.785.

$1000/$1.785 ~ 560.224089636

Taking 560 keys flat.