Karin A. Costa brings over 25 years of experience, education and training to your appraisal needs.

The Back Story

Growing up, many of my weekend adventures were focused around antique shopping with my grandparents, but I never imagined having a career in the antiques world.  It seemed to be more of a hobby or passion – until I joined the family construction business in 1987.  “ I quickly realized that I spent much more time at auctions, farm sales and estate sales.”  I opened my antiques brokerage in 1988 and got my estate brokerage and appraisal certificate in 1997 with a focus on estate and farm assets.  Today, my job as an auctioneer and appraiser involves selling and appraising residential, farm and small business assets. On occasion, I am called upon to work in the field of commercial equipment and machinery drawing on my experience in the construction industry.


Every single day I get to continue my learning.  To be relevant in this business, I have to stay on top of the market of a variety of asset classes and develop an instinct for what the market demands.  The thrills for me are the hunt for treasure and the research into market trends as well as into the back story of an object, artist or manufacturer have me hooked.


Part of my role is to educate my clients: what objects are important; why what they love may not be what the market loves; and by providing an impartial, independent and objective view of today’s asset values and marketability.  The research I do empowers my client’s decision-making and accounting.  It’s best to provide them with tools and guidance for me to be effective when communicating with them.


I am here for families, fiduciaries professionals when they are taking steps to retire, to grow or change their business, or when handling an investment.  A lot of people have questions about when it’s time to buy or to sell; questions about how their investments have performed; questions about how to manage their estate, collection or asset portfolio.  Whether it is pre-auction offers, solution options or process questions, I field questions about all aspects of auctions and appraisals, since most individuals and non-professionals need guidance having not gone through the process before. 


The other part of my work is being a problem solver.  I’ve learned over 22 years that no two situations are identical, but experience has shown me that there are similarities.  People come to me to develop solutions and execute plans, whether it’s a strategy to sell an estate, an appraisal to donate art and antiques, a time to file a damage claim on an asset, or some other problem.


I make a difference in people’s lives with expertise in selling and valuing assets with exposure to cosmopolitan to rural markets since 1987.


The Nitty Gritty


 I am an independent, generalist personal property. I am a member of the National Auctioneers Association holding the designations of Auction Marketing Manager, Certified Estate Specialist and Graduate Personal Property Appraiser (GPPA).  I have satisfactorily completed the Certified Machinery and Equipment Appraiser (CMEA) education and testing from the NEBB Institute along with continuing education at the American Society of Appraisers, Appraisers Association of America, International Society of Appraisers, Sotheby's Institute of Art, the Gemological Institute of America and Oxford Univeristy.  I provide the highest professional standards of appraisal and auctioning to individual or corporate clients in Nevada, California, Oregon and Washington. My concentration is in residential, farm and commercial contents, including art, antiques, collectibles, jewelry, tools, equipment, machinery and vehicles.



All appraisals are written in compliance with the most current Uniform Standards of Professional Appraisal Practice (USPAP) and the standards and Code of Ethics of the National Auctioneers Association (NAA) and the Certified Appraisers Guild of America. In addition, I had to pass examinations in ethics, theory and methodology.  

I began my estate and appraisal career with a Certified Estate Broker and Appraiser certificate from Edinboro University, and by graduating from the Missouri Auction School after earning a Bachelor of Arts in History from the University of Missouri.  Integrity, ethics and professional studies are essential to my professional practice.  Continued education in methodology and conoisseurship is essential and has been chosen from notable institutions.


I understand and appreciate a client’s need for confidentiality and trust, and adhere to the Gramm Leach Bliley Act of 1999.  

Passion  .  Discerning Eye  .  Trust


Karin Costa, GPPA, CAGA specializes in appraising large estates (typically 200 items or more), large private or specialty collections, important single objects, and business assets.


Karin Costa has focused much of her work on contentious situations of equitable estate distribution and family and partnership dissolution.  All information is maintained in the strictest confidence.


How Did We Get Our Trusted Reputation?


  • Appraising for trustees, guardians, executors, accountants and attorneys

  • Thorough research and report writing to the highest USPAP standards

  • Brokers of quality collections for estates and trustees




© 2010 - 2021 by Karin A. Costa, GPPA  AMM, CES                    775-722-2776               



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