I have noticed how few high end cables are actually silver. Most of these cables are copper cables with the manufacturer hyping something special about their copper. Some manufacturers claim better crystal patterns. Some claim less oxygen. I most cases, these copper wires sell for more money than buying pure silver.
Some cables are mixed copper and silver.
It is often difficult to determine how much silver and how much copper are in the wires. Stereophile acknowledged that bulk Radio Shack wire sounded good. Therefore when we spend money on high quality wire, it should sound better than good. When Monster Cable first introduced its wire, I bought some thinking that while it was expensive, it was something I would not have to buy very often and that if it improved the sound that would be great. If it didn't it looked cool.