California
Harmer-Schau Auctions
Chris Harmer and Kurt Schau
Petaluma, CA 94954
707-778-6454
Specialty: Auctions, Appraisals, Outright Purchase
Jerry Connolly Stamps
Jerry Connolly, Owner
Toluca Lake, CA 91602
Specialty: Quality U.S.
Schuyler Rumsey Philatelic Auctions
Schuyler Rumsey
San Francisco, CA
415-781-5127
Specialty: Quality U.S. and Foreign Stamps and Postal History Auctions
Stanley M. Piller & Associates
Stanley M. Piller
Walnut Creek, CA 94596
925-938-8290
Specialty: Quality Classic U.S. Stamps & Postal History
Jim Taff
Sacramento, CA
916-954-9007
Specialty: Confederates, Germany, British-French-Italian Colonies, U.S. Civil War Patriotics
Connecticut
University Stamp Company
Bryan Camarda
Westport, CT 06880
800-237-5692
Specialty: Classic Rare U.S. Stamps, Covers, Better U.S., Fancy Cancels and Appraisals. Historic Documents and ephemera, concentrating on US Presidential, American Historic, World Leaders, Leading authority on autographs and handwriting
Florida
Philatelic Stamp Authentication and Grading, Inc.
Randy Shoemaker, President
Melbourne, FL 32941-0880
305-345-9864
Specialty: Expertizing U.S., U.S. Possessions, Canada and Provinces
Roy Stamps
Roy Houtby
Titusville, FL 32780
905-988-8001
Specialty: Canada and Provinces, Stamps and Postal History
Valery Zagorsky's
Hallandale, FL 33008, USA
954-608-0882
Specialty: Stamps and Expertizing Service in Russian Empire 1857-1917 (excluding Zemstva and Civil War); RSFSR 1918 – 1922; USSR 1923-1991; Russian Federation 1992-present
Frank Bachenheimer
Sarasota, FL 34242
847-480-1880
Specialty: General U.S., Revenues and U.S. Possessions
Hawaii
Hawaiian Islands Stamp And Coin
Don Metcalf, Owner
Honolulu, Hawaii 96813
808-531-6251
Specialty: Hawaiian Stamps, Postal History and Foreign Stamps