While not every proof set is worth a mint (forgive the pun), there are a few that fetch thousands at auction. If you know ...

What Is The 1970 Kennedy Half Dollar Made Of? The only Kennedy half designed for circulation that contained any silver at all ...

"It is worth mentioning that there are two versions ... A low mintage figure, which is set by The Royal Mint, relates to how many of a coin were made. Generally, the lower that figure, the more ...