What determines a rare coin's value in Arizona?
Grade first, then rarity, demand, and provenance. Grade is often the single most powerful driver, and a one-point move on the Sheldon scale near threshold grades such as AU/MS or MS65/MS66 can swing price dramatically. Rarity is measured by actual survival at a grade, not mintage alone.
Is cleaning a coin collection before appraisal a costly mistake?
Never. Cleaning, polishing, and mishandling are major value reducers that appraisers flag immediately, and altered surfaces can disqualify a coin from higher grades. Keep original holders, tickets, pedigrees, and prior sale paperwork; they support authenticity and provenance.
Which references do coin appraisers actually use?
The PCGS and NGC price guides as industry-standard references, with realized prices from auction archives like Heritage carrying more weight than asking prices. For bullion coins, melt value references cover the intrinsic metal component.
Are coins in an Arizona estate taxed by the state?
No. Arizona has no estate or inheritance tax, so a coin collection passing at death is valued at fair market value with item-level support for the federal estate return, Form 706, when the estate exceeds the federal threshold.