While not every proof set is worth a mint (forgive the pun ... but this 10-piece collection from 1890 is anything but minor.

If your parents or grandparents did the same, you might be pleasantly surprised to find that the coins from those proofs can be worth a good bit. “Today, the proof half-dollars, especially the ...

He continued: “Now pay attention as the one that is worth a lot of money is the gold proof version.” While the obverse side of the coin, which is more commonly known as the “heads” side ...