Private Sales & Inquiries

Welcome to the private sales and inquiry gateway for Breen Stamps. Our collection comprises a multi-generational archive of exceptional U.S. and worldwide philatelic material. While our public listings showcase a growing selection of rare and desirable stamps, the majority of our holdings remain off-market. Many of these pieces are advanced, highly specialized, and rarely available through traditional channels.

Enhance Your Collection With Breen Stamps Private Sales & Inquiries

If you are searching for a specific issue, plate, scarce cancel, or high-grade example to complete your exhibit or investment collection, this is where the conversation begins. We welcome inquiries from collectors, exhibitors, and buyers who value precision, provenance, and access to material that seldom surfaces online. Our vast collection spans decades and generations - we have many rare and unique philatelic items rarely available in modern day.

• Mint and used plate blocks
• Early and mid-20th-century multiples
• Premium positions and arrow blocks
• Well-centered blocks suitable for exhibits

Back-of-Book & Specialized Material

• Revenue stamps
• Postage Due (J-series and Parcel Post Due)
• Officials, Carriers & Locals
• Newspaper & Special Delivery issues
• Other advanced U.S. specialties

Civil War–Era Material & Ephemera

• Early revenue stamps tied to wartime taxation
• Patriotic covers and military correspondence
• Engravings, documents, and period-specific ephemera
• Items illustrating postal routes, fiscal history, and wartime usage

Postal History

• Classic 19th-century covers
• Advertising covers
• First flights and airmail
• Special delivery and auxiliary markings
• Unusual origins, destinations, and rate-related pieces

EFO - Errors, Freaks & Oddities

• Missing colors, color shifts, and misregistrations
• Dramatic misperfs and off-center production errors
• Foldovers, paper creases, and production freaks
• Gutter snipes and unusual selvage anomalies
• Inverts and major design or printing mistakes
• Miscuts, misaligned panes, and odd placement examples
• Double impressions, over-inking, and ink skips
• Oddities with strong visual appeal or exhibition value
• Scarce production accidents that rarely reach the public
• Items documented through plate inspections, BEP anomalies, or one-time mechanical failures

Start the Conversation!

If you have a want list, a specific Scott number, or a hard-to-find item you've been chasing, we'd be glad to help. Every inquiry is handled personally, with an appreciation for collectors who value accuracy, provenance, and meaningful additions to their collections. Please use the form on this page to message us your interest.