Time and Effort: The hours spent on sketching, including any revisions or research.

Materials: The cost of high-quality pencils, paper, erasers, and other art supplies.

Skill Level: The experience and expertise as an artist, which can impact the value of art work.

Market Research: Similar sketches sold by other artists to get an idea of the prevailing prices.

Uniqueness: If your sketches have a distinctive style or are personalized, you can justify higher prices.

Overhead: Included any additional expenses like packaging and shipping.

Profit Margin: Artist’s reasonable profit margin that makes his efforts worthwhile.