What is the cost of a 1903 silver US quarter with eagle on back and an s under eagle?

The 1903 US quarter with an eagle on the back and an S under the eagle is known as the "Barber quarter" and is made of 90% silver. The value of a Barber quarter can vary depending on its condition, rarity, and market demand. Here's a general overview of the cost of a 1903 Barber quarter:

- Well-worn condition: A well-worn 1903 Barber quarter with significant wear and tear may have a value of around $5 to $10.

- Good condition: A 1903 Barber quarter in good condition with visible details but some surface scratches or wear may be worth around $15 to $25.

- Very good condition: A 1903 Barber quarter in very good condition with most details visible and minor signs of wear may have a value of approximately $30 to $50.

- Fine condition: A 1903 Barber quarter in fine condition with sharp details and minimal wear may be worth around $50 to $75.

- Extremely fine condition: A 1903 Barber quarter in extremely fine condition with excellent detail and minimal to no visible wear may have a value of approximately $100 or more.

- Uncirculated condition: A 1903 Barber quarter in uncirculated condition, meaning it has never been in general circulation and retains its original mint luster, can be quite valuable. The cost of an uncirculated Barber quarter can vary significantly based on its grade and rarity. It can range from a few hundred dollars to several thousand dollars.

It's important to note that the condition of the coin is a critical factor in determining its value. A professionally graded and certified coin will usually have a higher value compared to an ungraded coin of the same condition. Additionally, the rarity and mint mark (S in this case) can also influence the price.

If you have a 1903 Barber quarter and are interested in its exact value, it is recommended to consult with a professional numismatist or use a reputable coin grading service for a reliable valuation.