How to make your CD player/amp live longer ?

It's realy a matter of either using it or not using.
I saw the auction where Towncar from 1990 had only 7,000 original miles on it and were used not more than 4...500mi per year.

I shut the transport off. I leave the dac on full time. I leave the amp on full time, but lower the volume control setting to 00. Phono pre is in the amp. Power conditioner (active), stays on full time.

CD player has a mechanical drive that is likely to die. Pure electronics like amps are another thing. Caps may go after years, tubes need replaced and maybe a tranny may have problems but for a reference there are a ton of old guitar amps from the 50's and 60's out there that are still chugging along having lived a lot harder life than any home gear ever would.