1. Well-circulated condition: A well-circulated 1915 $5 gold piece, showing significant wear and tear, may be worth around $450 to $550.
2. Fine condition: A coin in fine condition, showing moderate wear but still retaining some original details, can be valued between $700 to $900.
3. Very fine condition: A very fine 1915 $5 gold piece, with minor signs of wear and good surface details, can be worth around $1,100 to $1,400.
4. Extremely fine condition: A coin in extremely fine condition, displaying minimal signs of wear and excellent surface details, might fetch a price range of $1,700 to $2,200.
5. Uncirculated condition: A 1915 $5 gold piece in uncirculated condition, showing no or very faint signs of handling, can be highly valuable. Values for uncirculated coins can range from $2,800 to $4,000 or even higher.
Please note that these values are approximations and can fluctuate based on market conditions, the coin's specific condition, and its certification or provenance if applicable. It's recommended to consult with a reputable coin dealer or numismatic expert for the most accurate valuation for a specific coin.