1. Good condition: A 1919 wheat back penny in good condition, showing some signs of wear but legible text and design elements, may be worth around $0.10 to $0.25.
2. Very good condition: A 1919 wheat back penny in very good condition, with light wear but still retaining crisp details and readable lettering, could be valued between $0.30 and $0.50.
3. Fine condition: A 1919 wheat back penny in fine condition, presenting little to no wear and clear design elements, may have a value ranging from $0.60 to $1.
4. Extremely fine condition: A 1919 wheat back penny in extremely fine condition, with sharp details, minimal circulation marks, and a pleasing appearance, could be worth anywhere from $1.50 to $2.50.
5. Uncirculated condition: A 1919 wheat back penny in uncirculated condition, exhibiting no signs of wear and retaining its original luster, is considered rare and can fetch a significantly higher price. Uncirculated 1919 wheat pennies can be valued between $5 and $20 or even more, depending on the coin's grade and preservation level.
Keep in mind that these values are approximate and can fluctuate based on various factors such as the overall coin market, scarcity, and buyer interest. If you have a 1919 wheat back penny and want to determine its exact value, it's recommended to get it professionally graded and appraised by a reputable coin dealer or grading service.