My system canton 9k speakers Technics SGU700 integrated,maker interconnects, monster m2 speaker cables, martantz cd 6006 player all used all trouble free (hope I did not jinx myself) for years. Before that bought all adcom gear pre &power amps, snell c2 speakers,same interconnects.quick story within hours of my installing the adcom system one strand of speaker wire touched the oppisite speaker wires from it resulting in immediate amp dying. I called adcom which was 30 mins. from my home in new Brunswick NJ at the time and for a dozen donuts they went through the amp and fixed it like new! I sold it after years of flawless service just to try something different.In hindsite I should have kept it for another room. Adcom Good stuff, good people.
New vs uses in your current setup
Curious the ratio new to used/demo in your current system comprised of.
I’m equally split on a “per box” basis although I tend to look for used cables almost exclusively.