575/2.01=286 keys

If something was added to the trade, you should bring proof of the agreement.

And you'll need a mini on the Bones RL (the war paint is like 40 k on marketplace, so the sale won't exceed 325k)

If the broken bones was included in the trade you will need a mini for it (a previous recent sale)

Because it was sold for $575 on marketplace you base it on the average key price for that day so 2.01 for the 20th

575/2.01

= 286

Then you would add whatever the recent sale was for the broken bones mini to the 286

https://forums.backpack.tf/topic/6033-rules-for-unusual-price-suggestions/

Use the value of keys on the site at which the item sold to determine the key conversion at the time of the trade. (i.e. use the SCM value of keys on SCM sales, use the marketplace.tf value of keys on marketplace.tf sales, use the opskins value of keys on opskins sales). For most transactions, this means you can use the key value at the exact date of the sale.

skin trading looks so whackers