A collection of 1,000-year-old Viking Age coins has just been discovered on the Isle of Man—a small British crown dependency located in the Irish Sea between Great Britain and Ireland.

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.

Although there are records of currency from other parts of the World in Ireland during the 10th century, the very first Irish coins were created around 997AD by order of the Viking leader Silkbeard.

Gold and silver coins celebrating Sir Paul McCartney have been put up for auction. One gold and four silver pieces are being ...