1. 1955 Wheat Head Penny (Common Date):
- Good (G) Condition: $0.10 - $0.25
- Very Good (VG) Condition: $0.25 - $0.50
- Fine (F) Condition: $0.50 - $1.00
- Very Fine (VF) Condition: $1.00 - $2.00
- Extremely Fine (EF) Condition: $2.00 - $4.00
- Uncirculated (UNC) Condition: $4.00 - $10.00
2. 1955 Wheat Head Penny (S Mint Mark, San Francisco):
- Good (G) Condition: $0.20 - $0.50
- Very Good (VG) Condition: $0.50 - $1.00
- Fine (F) Condition: $1.00 - $2.00
- Very Fine (VF) Condition: $2.00 - $4.00
- Extremely Fine (EF) Condition: $4.00 - $8.00
- Uncirculated (UNC) Condition: $8.00 - $20.00
Please note that these values are estimates based on current market trends and can fluctuate over time. It's always best to consult with a professional numismatist or check reputable sources for the most up-to-date values.