Gold, silver, platinum, palladium and other metals are all selling for certain trading prices that can change day by day. If you have a Troy Ounce of gold, for example, you can check on our home page and see that you should be able to sell it for $1809.20.

Watching Downton Abbey can alert you to all kinds of antique precious-metal items that you can find if you’re shopping online, at antique stores, at estate sales . . . just about everywhere old metal items can be found. Here’s a checklist of items that we noticed during just one episode of the show...