Hi Wren, Thank you for contacting Mearto with your appraisal inquiry. I can't find another black cello having sold at auction recently enough to compare values but there have been ones that have sold in other colors, all less than $500. None of them were marked, either. Based on the photos and information provided, and subject to examination, this is: A contemporary black varnished full sized cello unattributed maker, International school, 20th/21st Century Unlabeled, with black gilt-dust (glitter) varnish (worn in some places), full (4/4 size) CONDITION: appears to be in good condition with some gentle use wear. PROVENANCE: acquired from a teacher $300-500* *represents a fair-market value for auction purposes; retail or asking price may vary. Please let us know if you have additional items to appraise, and thank you again for using Mearto.