Let's try this again.

Bought for $1100 and Sunbeams Pyromancer's Mask - https://backpack.tf/profiles/76561198045916153#!/compare/1611273600/1611360000

We both get our keys off of Backpack cash forums, so key prices were determined by average of crypto key sellers ($1.75) and Paypal key sellers ($1.87), for an average of $1.81 a key on day of sale.

$1100/$1.81=607.73 Keys, rounded to 610 Keys, plus Sunbeams Mancer @ 420 Keys = 1030 K, which is rounded to 1050 Keys.

Thanks for the help, Braxol!

Proof:

https://imgur.com/a/RZ0Fx1j -Transactions and screenshots.

https://forums.backpack.tf/topic/75470-20012021-willing-to-sell-1k-keys-for-175-in-crypto-accept-any-coin/ -Forum post for crypto

https://forums.backpack.tf/topic/75702-selling-300-keys-187-400-tour-of-duty-tickets-085-paypalzelle/ -Forum post for Paypal