I work at an electronics store, and I've realized that the markup on cables is crazy high. Often times like 1000% profit per cable. If I could find the right market. I would open a cable specialty store where I would sell all types of printer cables, video cables, power cables, speaker wire, and other accesories. Kinda like Radio Shack, but more customer service oriented. We would probably do lot's of special orders which we could charge extra money for.