[ilyt]

Audiophile/audiophoolery is certainly one mark up, but stuff made on that small scale generally needs huge markup just so the company making it turns a profit

But considering they sell magic power cords ( https://bottlehead.com/product/bottlehead-power-cord-kit/ ) it's probably well into audiophoolery spectrum.

[systems_glitch]

I redid a lot of their original "Foreplay" preamps for the aforementioned audio shop -- they were available as a kit option and a lot of guys butchered the assembly, apparently. Back then, the power transformer was the cheapest combo plate/filament transformer from Antique Electronic Supply, but spraypainted black. That particular transformer was being loaded at like twice its filament current rating! Little stuff like that really bothered me.