https://backpack.tf/profiles/76561198180461089#!/compare/1555977600/1556064000 - Sold for 27 Keys + 3.33 Refined

https://backpack.tf/profiles/76561197971027065#!/compare/1543449600/1557100800 - ?

https://backpack.tf/profiles/76561198126142303#!/compare/1557100800/1557187200 - Buyer's side for the ? sale

27 was the guy you sold it to who sold it in 1 day, so it can probably be discounted as low from him regretting the purchase.

https://marketplace.tf/items/30313;5;u18 - Sold for $57.38 (Keys were $1.82), $57.96 (Keys were $1.80), and $45.15 (Keys were $1.81)

That makes these sales 31.52 Keys, 32.2 Keys, and 24.9 Keys.

31.52 and 32.2 are probably too high because of the 1 month unsold at 31.7 Keys -> https://imgur.com/a/0nQxa7G

https://backpack.tf/item/6917411279

24.9 is low because it went to a buy order -> https://imgur.com/a/uBlol0D