David Akers (1975/88): The U.S. Eagle series is loaded with rare and underrated issues, more than any other series of U.S. coins. But even in this grossly underrated series, the 1867-S stands out. It ranked sixth in the series accorcing to rarity by frequency of appearance (tied with the 1798/7, 7x6 Stars and 1873 - pretty good company) and shared the top spot with the 1864-S and 1875-CC according to rarity by average grade. The 1867-S is only marginally less rare overall than the 1864-S and 1866-S No Motto and compares favorably to the 1860-S and 1865-S normal date.
David Hall: It is estimated that only 50 to 75 examples of the 1867-S survive today in all grades. I have never seen or heard of a mint state specimen. I was only able to obtain an EX45 for my set and I looked for 6 years.