The most valuable silver coins sell for millions ... eliminated 90% silver coins from circulation, according to a blog from ModernCointMart. That law mainly affected U.S. dimes and quarters.

These coins were gradually rolled out, with dimes and quarters first appearing ... value is determined by rarity and condition, so the most valuable quarters include several of the oldest that were ...

If you've ever gotten into coin collecting, you likely have looked up values of rare ones that could still be in circulation.

It always helps to have a little bit of coin around -- whether that be commonplace coins you keep in your purse for everyday ...