I wouldn't dream of paying more than £50 for a pair of interconnects (which is why I make up my own), yet have paid £1,000 for a cartridge and a couple of thousand or more for preamps or CDPs; all of which were 'pre-owned'.
In the past, I used (then) 'state of the art' (film) cameras, costing thousands for travel photography, but I now use a fairly cheap digital camera of adequate quality.
Whereas my contemporaries run around in performance-tuned Mercedes and Audi cars, yet possess very modest audio systems, or none at all.
So it all depends on your interests and how you want to spend your money.