I would need more information about your coin than just the date. The value of any coin is based on condition. Not just date. I am confused about the date "1988" . The reason is that Liberty Seated Dollars were minted between 1840-1873; Trade Dollars between 1873-1885; Morgan Dollars between 1878-1921; Peace Dollars 1921-1935Eisenhower Dollars 1971- 1978; Susan B. Anthony 1979-1999 (No 1988 coins minted that year ). On top of the date I would need to know what mint make in on it and something of the condition. Check your coin and ask the question again.