Sales platforms, grading, and auction venues all influence a coin’s price—but how much? A closer look at the key-date 1934 Irish florin reveals the challenges of accurate valuation.

At that time, a half crown made for a sizable gift: eight of them made up one pound. The half crown was a coin in our old ...

Two of the coins — a shilling and a threepence — display the busts of Elizabeth I, while another shilling show Charles I. Coroner Margaret Taylor declared the find treasure because "the hoard ...