Cables are essentially conductor wires connected to one device to another. What it do is just transmit pulses of electrical signal (digital signal) from one end to the other. In a way, only thing that matters probably is the quality material of the cable itself and the length of it. Shielding and other good quality material used in making the cable like the insulation bit could be the contributing cause for the higher cost. Brand could also be a factor. Normally static inteference wont be that high enough to interrupt the signal nor do much loss of voltage due to the short length. So in a way, cheap cable will do just fine as long you dont mind the "made in China" brand.