The toning at the rims is quite dark, almost ink black with a just a hint of blue, and lightens nicely as it moves into the fields. The reverse is more exciting with sunset orange coming through the wreath details. Total PCGS AU population is 28 with 7 in AU 55 and 11 in AU 58. The BCCS rating is R1.
The 1902-O Dime has a seemingly large mintage of exactly 4.5 million coins, but they were either ignored by collectors or the coins had a hard time getting from New Orleans to the collectors in the North. As a result, high-grade examples can be pricey. In most circulated grades, the 1902-O Dime commands only a small premium, but in AU and better grades the price jumps quickly. Mint State examples are scarce but not rare. The most frequently-seen Mint State grade is MS64. Gems are very rare and anything above MS66 is nearly impossible to find.
The best example of a 1902-O Dime (and a colorful one, to boot) is the NGC MS67 from the John Jay Pittman and Eugnene Gardner collections. Coincidentally, that piece has the record price of $12,650 for the date.
Bob R. Simpson Collection - Legend Rare Coin Auctions 12/2014:90, $9,400 - Stack's/Bowers 11/2015:20036, not sold