Sunbeams Magistrate's Mullet

https://marketplace.tf/items/tf2/147;5;u17

https://backpack.tf/item/3826895575

https://bot.tf/stats/listings/4R05O1J2 - sold for $73.99 (37 keys)

https://backpack.tf/profiles/76561198192587726#!/compare/1590192000/1590278400 - unsure

https://backpack.tf/profiles/76561198138664594#!/compare/1590019200/1590105600

https://backpack.tf/profiles/76561198192587726#!/compare/1590105600/1590192000

https://bot.tf/stats/listings/MXX83QQP - sold for Stormy Storm A Rather Festive Tree (17) + 9 keys + stuff (8.5) = 35 keys

https://backpack.tf/profiles/76561197963100339#!/compare/1589328000/1589414400

https://backpack.tf/profiles/76561198138664594#!/compare/1589328000/1589414400 - sold with Purple Energy Pyro's Beanie + 5 keys for Purple Energy Galvanized Gibus (better to use there)

https://backpack.tf/profiles/76561198301649793#!/compare/1589673600/1589760000

https://backpack.tf/profiles/76561198218628708#!/compare/1589241600/1589932800 - sold with 25 keys for Burning Flames Backbiter's Billycock (59.5) = 35 keys

https://backpack.tf/profiles/76561198305494036#!/compare/1588118400/1588204800

https://backpack.tf/profiles/76561198301649793#!/compare/1588118400/1588204800

https://bot.tf/stats/listings/466GK272 - sold for 34 keys (sold within 2 days)

https://backpack.tf/profiles/76561198089253101#!/compare/1591056000/1591142400

https://backpack.tf/profiles/76561198889987634#!/compare/1591142400/1591228800 - sold for 40 keys

Conclusion:

sales at 34, 35, 35, 37, 40

35 - 40 keys