Despite the interruption of bullion issues, the Proof American Eagle 1-ounce platinum $100 coin has been issued every year. This continuity adds to the collector appeal of the series, as do the well-executed annually changing designs.
Another big reason for collector enthusiasm is that the coins hold their value. Sold by the Mint each year at a premium of $350 to $400 above platinum spot price, they maintain this price in the secondary market.
Older issues have appreciated, as have coins graded Proof 70 by Numismatic Guaranty Corp. and Professional Coin Grading Service.
The main reason these coins hold their premium is that mintages of Proof American Eagle platinum 1-ounce coins are low. Most are below 10,000. The 2013 and 2014 issues are below 6,000, and can still be purchased at or near their original issue price.
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