My kit is just too vintage and of too many different decades, to do this sort of analysis! Even using an inflation calculator doesn’t help much as technologies, economy of scale etc change. I’ll use the upstairs system as an example as it is rather more simple than the main one:
Source: Marantz SA 8005 SACD player, about £550 5 or 6 years ago.
Preamp: Audio Synthesis Pro Passion stepped attenuator, about £400-500 in 1993.
Power amp: Leak Stereo 20, about £30 in 1958.
Speakers: JR149, about £130 in 1978.
Target R4 stands, vdH interconnects and Chord speaker cable, about £600-700 late-90s.
I’ve honestly no idea how to work that out as a ‘today’s price’ thing as some items, e.g. the Leak and JR149s, would be rather expensive if made now (think Falcon LS3/5A, EAR, Radford Revival or whatever nice UK-made valve amp). It all sounds nicely balanced anyway!