Ron Guth: In 1873, employees at the Carson City Mint produced both Seated Liberty Dollars and Trade Dollars. The Seated Liberty version boasts a low mintage of only 2,300 pieces, and the date stands as one of the great rarities of that series. Much of the reason for the low mintage of the 1873-CC Seated Liberty Dollar can be attributed to the time and resources diverted to the Trade Dollar, which has a substantially higher mintage of 124,500 pieces (by far, the highest output of CC-mintmarked Dollars up until that point).
In circulated conditions, the 1873-CC Trade Dollar is readily available up until the EF-AU grade, above which prices and rarity rise quickly. Though the Condition Census for this date inlcudes coins in MS-63 and better, any Mint State 1873-CC Dollar can be considered a prize. The most commonly seen Mint State grade is MS62, implying that most survivors are somewhat "baggy" from having come into contact with other coins. The finest 1873-CC Trade Dollar certified by PCGS is a single MS-65.