I usually buy my cables there since the price difference for brand cables is negligible and I like to have my cable actually do the rated specs. Full pc parts no, but then again I usually buy niche parts not widely available. I usually go to the small repair shop first, and if they don't have any to the big brand. Small shop is a bit more expensive but the guy can order specialized small parts (printer memory module comes to mind) if you ask nicely and even directed you to other shops. Medium sized 100k+ city in NW Europe.