The market value of porcelain sculptures can vary significantly depending on whether they are signed or unsigned by the artist. Signed pieces often command higher prices due to their verified authenticity, direct connection to the creator, and enhanced collectibility. Artists' signatures serve as a mark of provenance, assuring buyers of the artwork's legitimacy and often indicating limited production runs.

Unsigned porcelain sculptures, while sometimes still valuable, typically sell for lower prices unless they are rare or from a highly sought-after era or style. Collectors may need to rely on other authentication methods, such as expert appraisals or historical records, to determine their worth. Factors like craftsmanship, age, condition, and artistic significance also play crucial roles in valuation.

The premium for signed works can range from 30% to several times the value of comparable unsigned pieces, especially for renowned ceramic artists. However, some unsigned antique porcelain sculptures from important periods (like Ming Dynasty or Art Nouveau) may still achieve remarkable prices at auction. Ultimately, while signatures provide certainty, unsigned pieces with exceptional quality or historical importance can also represent worthwhile investments for discerning collectors.