Thermal Energy

https://backpack.tf/item/5808006664

Sale 1) Sold for 40 Keys

https://backpack.tf/profiles/76561198338556449#!/compare/1554595200/1555027200

Low outlier.

Sale 2) Sold for a Scorching Flames Sky High Fly Guy (41.5 Keys) + 5 Keys + ~0.5 Keys of Items

https://backpack.tf/profiles/76561198343885717#!/compare/1554940800/1555027200

https://backpack.tf/profiles/76561198859721638#!/compare/1554854400/1555027200

41.5 + 5 + 0.5 = 47 Keys

Sale 3) Sold + 10 Keys for a Galactic Gateway Hephaistos' Handcraft

https://backpack.tf/profiles/76561198859721638#!/compare/1554854400/1555027200

Using this for the Handcraft.

Sale 4) Bulk sale

https://backpack.tf/profiles/76561198218497692#!/compare/1557014400/1557100800

Sale 5) Sold for a BS Hot Damascus and Mahogany Rocket Launcher (30 Keys) + 22 Keys

https://backpack.tf/profiles/76561198285371555#!/compare/1557187200/1557360000

30 + 22 = 52 Keys