Credit to Beyond for the help!

Sale 1)

https://gyazo.com/8ea13ccffae400a7ce48ba26be370fae

https://gyazo.com/2f29a147ef55cd30cdb3986decbc2aea

https://backpack.tf/item/2031379549

Sold for a Golden Frying Pan (Recently priced at 3400 Keys), 1600 keys and $166.69 in cash or around 100 Keys --- 5100 Keys

Mini for cash

https://forums.backpack.tf/forum/27-team-fortress-2-cash-trading/

https://forums.backpack.tf/topic/85451-%F0%9F%92%B0buying-keys-for-16-and-backpacks-for-paypal-revolut-twint-%E2%9C%85/ keys buying at $1.60

https://forums.backpack.tf/topic/68510-buying-keys-for-150-backpacks-via-paypal-700-trust-ratings%E2%9C%85/ - keys buying at $1.50

https://forums.backpack.tf/topic/78488-%F0%9F%97%9D%EF%B8%8Fbuying-keys-for-166-paypal-153-for-crypto-and-tods-for-068-%E2%9C%85-100-trust/ - keys buying at 1.66

(1.60 + 1.50 + 1.66)/3 = 1.58

166.99/1.58 = ~ 105

Taking 105 Keys

3400 + 1600 + 105 = 5105 = ~ 5100

Round to 5100 Keys

Going 5100 Keys Flat.

Feedback welcome! Thanks!