Are silver candlesticks worth anything?

So as far as the value of sterling silver candlesticks goes you can see that they may look like valuable family treasures, but they may only be worth $5 or $10 each. So if your wife likes these candlestick holders, and will use them, then it may be worth holding on to.

How can you tell if something is real brass?

If the magnet sticks, the item is usually steel or cast iron, with a brass plating. If the magnet does not stick, you can test further by scratching a hidden area with a sharp tool. If you see a shiny yellow scratch, the item is likely solid brass. If you see a silvery scratch, your piece is likely white metal (zinc).