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Sold prices, dealer asking prices and price guides each tell you something different about what a coin is worth. Here's which one to trust, and when.
Sep 28, 2026
Collecting
Should you track your coin collection in a spreadsheet or an app? What each does well, where each breaks, and what to record for every coin.
Paper Money
A star in a banknote's serial number means it's a replacement note. Here's how to spot star notes, why some are worth a premium, and how to check yours.
Grading
PCGS, NGC and PMG are the big names in coin and banknote grading. What each one grades, how they differ, and why the label changes the price.
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