Item 1

https://backpack.tf/item/1675970511

Sale 1

https://backpack.tf/profiles/76561198045022302#!/compare/1691020800/1692144000

https://backpack.tf/profiles/76561199109683424#!/compare/1691539200/1692057600

No clue, looks like just an item transfer / cash sale

Sale 2

https://imgur.com/a/JFMRHXo

$950 + $2050 = $3000 USD

Mini for the Key Price - Taking everything from up to a wkish ago

https://forums.backpack.tf/topic/38397-%F0%9F%9F%A2frost-is-buying-inventories-keys-for-171-paypal-173-crypto-1000-trust-ratings%E2%9C%85-no-rep-needed/page/8/

https://backpack.tf/trust/76561198061836787

Lots of sales here ~$1.71

https://forums.backpack.tf/topic/80055-buying-tf2-keys-for-183-usd-184-if-1000-via-paypal-australia-40-trust/

https://backpack.tf/trust/76561198117597416

Sales @ $1.83

https://forums.backpack.tf/topic/80319-%F0%9F%92%B2covering-all-fees-%F0%9F%92%B8buying-fullpartial-tf2cs-backpacks-and-items%F0%9F%8E%92with-cash-paypalbank-transferwise-most-currenciescountries-availableetransfercad-bank-transfer-or-keys-buying-%F0%9F%94%91keys-for-174-usd233-cad-128-cash-trust/

https://backpack.tf/trust/76561198043858325

Sales @ $1.74

https://forums.backpack.tf/topic/66758-buying-keys-for-182-usd-via-paypal400-rep/

https://backpack.tf/trust/76561198063345374

Lots of sales @ $1.82

https://forums.backpack.tf/topic/68510-buying-keys-for-180-backpacks-via-paypal-500-trust-ratings%E2%9C%85/

https://backpack.tf/trust/76561198032176942

Sales @ $1.80

https://forums.backpack.tf/topic/80968-%F0%9F%A6%8A-buying-keys-%F0%9F%94%91-at-175-and-backpacks-with-paypal-and-zelle-350-trust-ratings-%E2%9C%85/

https://backpack.tf/trust/76561199183171982

Sales @ $1.75

(1.71 + 1.83 + 1.74 + 1.82 + 1.8 + 1.75) / 6 = ~$1.78 avg

$3000 / $1.78 = ~1685 keys

Total Sales

1685

https://imgur.com/a/kjGswRe

Rounding and taking 1700 keys c: