Dealers that sponsor infomercials on shortwave radio are notorious for such sales pitches, most notably Discount Gold & Silver Trading on WWCR, which proclaims graded coins, in direct contradiction to their pricing history, as having appreciated more than non-graded coins, or as not likewise being "opinion coins."
Guinea (British coin) | coin | mint (coin) | Collecting | Coin flipping | Mint (coin) | COIN | Dollar coin (United States) | commemorative coin | Comic book collecting | Token coin | token coin | Stamp collecting | stamp collecting | Quarter (United States coin) | Nickel (United States coin) | Gold coin | dollar coin | Crown (English coin) | Crown (British coin) | Counterfeiting Coin Act 1797 | Coin collecting | Coin | 500 yen coin | Zuz (Jewish coin) | Zuz (coin) | the Mint's coin collection | Silver coin of the '''Kuninda''' Kingdom, c. 1st century BCE.
'''Obv:''' Deer standing right, crowned by two cobras, attended by Lakshmi | Silver coin | silver coin |
The coin collecting board was invented in 1934 by Joseph Kent Post, an engineer with Kimberly-Clark in Neenah, Wisconsin.