I can't imagine the parts not having come from China, but that's interesting that he makes them himself. That would explain why his price sucked on it... And actually, that worries me now, I hope he just slapped the Turbo Duo pin on it and a LED light or something as opposed to having designed the circuit. I was hoping this is a professional and complex circuit with regulators, ICs and everything, like what you see inside a power supply for a LCD monitor. I have one that delivers a perfect 12 VDC and it is almost like a small CPU run PCB. It has tons of surface mount caps and resistors, 2 regulators, 6 big aluminum caps, several IC type chips, etc. Surge protection is probably inherent to them...
Anyway, I just hope he was limited to tip choice and that's about it when it comes to this. I wouldn't mind seeing a photo of the PCB, and maybe I should've asked for that before paying you, oh well... The guy could've slapped something cheap in there and just bullshitted the public... $23 is way too much money for just a power supply. It smacks of the opportunistic taking advantage of retro fans that's popular these days...