Foss Appraisal Service
Seattle's Choice for Appraisal and Estate Sale Services


Our Credentials


Each appraisal report comes with accurate and reliable descriptions and values that reflect the current market trends. We provide our clients with a wide variety of established and experienced services to successfully maximize the value of your belongings, antiques and collectibles.


International Society of Appraisers Accredited Member Logo

ISA members are the recognized authorities on professional personal property appraising and are distinguished for their professionalism, knowledge, and expertise. They include many of the country’s most respected independent appraisers, consultants, estate liquidators, auctioneers, gallery owners, and dealers. Membership is held by individuals only—business entities or organizations may not hold membership or advertise as members. Members must re-qualify every five years.


The most prestigious credential in the industry, the GIA Graduate Diamond program gives you the comprehensive knowledge of diamonds you need to succeed anywhere in the jewelry business. You’ll gain both technical expertise and practical skills to evaluate gemstones by the 4Cs (color, clarity, cut, and carat weight), the International Diamond Grading System™.