1. Without Mint Mark:
- If the coin doesn't have a mint mark, indicating that it was minted in Philadelphia, it is a relatively common date and usually sells for around $1-$2 in fair condition.
2. With Mint Mark (C for Charlotte):
- If the coin has a "C" mint mark, indicating that it was minted in Charlotte, North Carolina, it is considered a scarce variety and can be more valuable. In fair condition, it could fetch between $5-$15.
3. With Mint Mark (O for New Orleans):
- If the coin has an "O" mint mark, indicating that it was minted in New Orleans, Louisiana, it is also considered a scarce variety and can be more valuable than the Philadelphia or Charlotte pieces. In fair condition, the 1868-O 3 cent piece might be worth around $10-$25.
Remember, these values are just estimates, and actual prices can fluctuate depending on market conditions and specific buyer interest. It's always advisable to consult with reputable coin dealers or numismatic experts for a more accurate appraisal of your coin.