ifilipovic amplifier & PS kits

I see Wima, Nichicon, Elna parts there, not sure why you call them "low quality".

YOU build it, YOU tell us, how´s that?

And it´s a parts kit, not a ready built preamp.

In general,"electronic parts" are relatively cheap, the big expense comes from power supply, chassis, cabinet, punched and silkscreened panels, knobs, etc. , none of which are included there.

Excellent Russian 6N2P tubes can be bought in bulk for $2 each.