A coin can be worth a ton of money -- a pretty penny, one might say -- if it's rare and has enough historical significance.

This Graded Choice Very Fine 35 by PMG bank note was printed when the far reaches of western Canada were in its infancy, ...

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.