Decided to try to price this since I forgot to when I bought it.

Sale #1: Sold for a White Lightning Blast Defense (25) and a Professional KS Australium Force of Nature (13.1) = 38.1

https://backpack.tf/profiles/76561198153789411#!/compare/1551830400/1552003200

https://backpack.tf/item/7301963853 <-- (The Head of Steam weirdly doesn't appear in the above comparison, here's its history to prove it was exchanged there)

Mini on the White Lightning: Sold for a Hot Professional KS FT Airwolf Wrench

https://backpack.tf/profiles/76561198048046849#!/compare/1554595200/1554681600

Mini x 2 on the Wrench:

https://backpack.tf/suggestion/5caa8796d381727a9f2f86ac

Sale #2: Sold for a Searing Plasma Hustler's Hallmark (49) and a Potassium Bonnet (12.1) = 61.1

https://backpack.tf/profiles/76561198013245606#!/compare/1552348800/1552435200

Mini on the Hustler's: Sold alongside a Vivid Plasma Millennial Mercenary (46) for a Omniscient Orb Patriot Peak (95)

https://backpack.tf/profiles/76561198079821428#!/compare/1550448000/1550534400

Additionally, there was this sale that was a bulk sale and had a bunch of outdated and unpriced messiness. Without touching the unpriced and seemingly-bugged war paints, and not performing minis, the sale comes out to value the Blast Defense at roughly 65 keys. Not a usable sale in that state, but figured it would be valuable supporting evidence to indicate the 61.1 isn't an outlier.

https://backpack.tf/profiles/76561198153789411#!/compare/1551830400/1551916800

Thanks, let me know if I missed anything!