It's no surprise that proof set values are linked to the metal of the coins, but this super-valuable gold proof set is...well ...

a 1920 Indian Head Gold Coin in circulated condition is worth between $20,000 and $75,000. But that value rises to as much as $2 million for specimens in pristine, uncirculated condition.

Circulating coins are worth $408,000 to $409,000 in average condition and upwards of $1.1 million for uncirculated condition. In 2009, the Strawberry Leaf penny broke records for the most money ...

The Lennon coins follow the exact same formula as the McCartney series. They range from the John Lennon 2025 UK £5 Brilliant Uncirculated Coin for £18.50 (approx.. $AUD37) up to the John Lennon 2025 ...