Here are some approximate value ranges for different grades of an 1890 silver dollar with an S mint mark:
- Good (G): $25 - $80
- Fine (F): $80 - $180
- Very Fine (VF): $150 - $260
- Extremely Fine (XF): $250 - $500
- Uncirculated (UNC): $500+
Of course, if the coin has unusual characteristics, errors, or special historical significance, the value could be even higher. To determine the exact value of your 1890 silver dollar with an S mint mark, it's advisable to consult with reputable coin dealers or seek a professional appraisal for the most accurate valuation.