Hello, my name is Isabelle Weiss.

After a decade of experience in the primary and secondary art markets, I built CollectorAnonymous to provide comprehensive appraisal and advisory services that help shape the future of collection management for private, corporate and institutional clients.


About Isabelle:

Isabelle Weiss is an Accredited Appraiser and Contemporary Fine/Decorative Arts specialist based in Detroit, MI with a decade of art market experience from auction cataloging to appraisal and collection advisory. Weiss has executed collection management services for a broad range of clients, including: private collectors and their professional advisors, corporate collectors, real estate developers and educational institutions.

Clients include:

Delta Dental of Michigan, Boston Consulting Group, CBRE, Broder & Sachse, Dykema; established and emerging art collectors

Driven by commitment to excellence:

Weiss is a “qualified appraiser” as defined by IRS Publication 561 (01/2023) and an Accredited Member of the International Society of Appraisers (ISA), surpassing the continuing education and industry experience requirements of both the ISA and the IRS.

+More about Requirements of a “qualified appraiser”

In addition to completing the Uniform Standards of Professional Appraisal Practice National Update course every two years and the ISA Requalification Course every five years, Weiss regularly completes:

  • Annual coursework on appraisal methodology and specialty topics (such as art conservation or contemporary prints) from ISA and Appraisers Association of America

  • Webinars from such organizations as Financial and Estate Planning Council of Metro Detroit contemplating legislation changes impacting users of appraisals

  • Webinars reporting art market trends from UBS, Bank ofd America and ArtTactic

Weiss also attends/presents in annual appraisal conferences such as International Society of Appraisers Assets Conference.

Led by art expertise + passion for collecting:

Working with collectors, artists and curators in fine art, craft and design over the past decade, Isabelle’s insight and passion led her to develop an appraisal and collection management agency to meet the specific needs of clients in the contemporary art market.

Isabelle Weiss began her career at a regional auction house, working as a cataloger and appraiser of fine and decorative art, later directing auction operations. Moving from the secondary to primary market, Isabelle Weiss founded I.M. Weiss Gallery, presenting contemporary craft and design, which she directs in tandem with CollectorAnonymous in Detroit’s North End.

Publications, Lectures + Volunteering:

Through I.M. Weiss Gallery, Isabelle regularly publishes projects examining the value of collectible craft and design - from exhibitions to film, essays and a book

Isabelle has contributed to publications including SURFACE magazine and presents lectures on emerging trends in art, craft and design collecting for organizations such as International Society of Appraisers and Canadian Society of Decorative Arts.

She is the past Chair of the Fine Art Committee of ISA and on the Board of Advisors for the Marshall M. Fredericks Sculpture Museum.

Education:

Isabelle Weiss earned her B.A. in History of Art, and Linguistics from the University of Michigan and is an Accredited Appraiser through the International Society of Appraisers (ISA).

I look forward to helping you with your art appraisal and advisory needs,

Isabelle Weiss

Accredited appraiser of fine + decorative art

Director, CollectorAnonymous