Key Date $5 Gold Eagle! The 1988 $5 is the coin most Gold Eagle collectors will never have a chance to own. With a low mintage of 159,500 coins, NGC has only ever graded 139 coins in perfect MS70. That is less than 3 per state to go around. This 1988 $5 Gold Eagle NGC MS70 has been hand signed by the designer Miley Frost (Busiek) in the NGC U.S. Mint Designer Series pedigree. The very best of the best here.