I just returned from 4 electronic shops on the weekend, in a major california city. I couldn't not find jumper cables and switches on the size that i needed, or

I just returned from 4 electronic shops on the weekend, in a major california city. I couldn't not find jumper cables and switches on the size that i needed, or plastic knob covers. let alone a good looking big metallic knob cover that i wanted. I finally found the jumper cables only at a frys, but for 7x the price i could have them online, shipped from china. But since i was in a hurry, I paid $20 for a broken stereo receiver at craigslist and removed the parts I needed.