The 2006 Reverse Proof Gold Eagle was a special coin offered by the United States Mint to celebrate the 20th Anniversary of the series. The coin represents the first and only Gold Eagle struck with a reverse proof finish.
On August 30, 2006, the US Mint began sales of the 20th Anniversary Gold Eagle Set. Each set included three one ounce coins featuring a different finish, proof, uncirculated, and reverse proof. A product limit of 10,000 sets was established, with a household ordering limit of ten. The special sets were immediately popular with collectors, resulting in a prompt sell out.
The reverse proof coin became the key to the set since it was not offered separately or within other sets. By comparison, the standard proof coin was offered for sale individually or within the four coin proof set. The uncirculated coin was offered in a separate 20th Anniversary Gold and Silver Eagle Set, and later individually.
The final audited mintage for the 2006 Reverse Proof Gold Eagle was 9,996, which at the time established a new mintage low for the American Gold Eagle series. Subsequent issues such as the 2008-W $10 Uncirculated Gold Eagle and 2011-W $50 Uncirculated Gold Eagle would later have slightly lower figures. Nonetheless, the special reverse proof coin remains popular due to its unique finish and important place in history.
2006 Reverse Proof Gold Eagle Prices, Limits, and Sales
| Product | Initial Price | Product Limit | Mintage Limit | Final Sales |
| 1 oz. | $2,610.00 | 10,000 | 10,000 | 9,996 |
2006 Reverse Proof Gold Eagles For Sale
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 2006 PCGS PR70 First Strike $50 Reverse Proof 20th Anniversary Gold Eagle $3,849.75 Time Remaining: 6d 10h 1m Buy It Now for only: $3,849.75 |
 Registry Coin 2006 American Gold Eagle REVERSE PROOF PCGS PR-70 First Strike $3,995.00 Time Remaining: 29d 8h 12m Buy It Now for only: $3,995.00 |
 2006-W $50 (1oz) 20TH ANNIVERSARY GOLD AMERICAN EAGLE REVERSE PROOF PCGS PR69 FS $3,279.95 Time Remaining: 23d 20h 5m Buy It Now for only: $3,279.95 |
 2006-W 3pc PCGS PR69 MS69 69 FIRST STIKE Proof 20th Anniv GOLD Eagle Set Reverse $6,299.00 Time Remaining: 17d 13h 58m Buy It Now for only: $6,299.00 |
 2006-W $50 REVERSE PF70 Proof GOLD Eagle NGC 20th Anniversary PR70 Blue Label $3,400.00 Time Remaining: 24d 14h 34m Buy It Now for only: $3,400.00 |
 2006-W $50 REVERSE PF70 Proof GOLD Eagle NGC 20th Anniversary PR70 Blue Label $3,369.00 Time Remaining: 21d 8h 2m Buy It Now for only: $3,369.00 |
 2006 W $50 1 oz American Gold Eagle REVERSE PROOF PCGS Reverse PR70 First Strike $3,999.00 Time Remaining: 1d 7h 16m Buy It Now for only: $3,999.00 |
 2006-W 3pc PCGS PR69 MS69 69 Proof 20th Anniversary GOLD Eagle Set PF69 Reverse $6,089.00 Time Remaining: 20d 10h 20m Buy It Now for only: $6,089.00 |
 2006-W $50 PCGS PR69 FS Gold American Eagle 20th Anniv. REVERSE PROOF 1 oz.!!! $3,450.00 Time Remaining: 29d 12h 11m Buy It Now for only: $3,450.00 |