These US Constitution Bicentennial gold coins were among the first coins struck after the modern US commemorative coin era began in 1982 - they were just the second modern $5 gold commemorative coins ever struck. (The 1986 $5 gold coins for the Statue of Liberty Centennial program were the first half eagle pieces produced by the US Mint.)
As a result, the coins were popular with a larger group of collectors which is reflected in their final sales/mintage figures: 214,225 for the Uncirculated version and 651,659 for the Proof version.
These high mintage figures have created a supply that far exceeds today's collector/numismatic demand and so the value of most examples is now pegged to the coin's melt value.
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