Ron Guth:
The 1877-CC Quarter Dollar is a surprisingly common coin. It represents one of the best values in all of the CC-Mint coins. In terms of certified examples, this date is almost as plentiful as the 1876 -- and both dates have nearly the same number of certified Mint State examples. Of course, the real attraction of this date are the two little letters that represent the CC-mintmark on the back of the coin. Thus, this date will always command a premium simply because it originated in Carson City.
The images above illustrate the gorgeous color and eye appeal that many examples possess. Those are the priciest examples, but there are many mid-range, Mint State examples that can be just as attractive.