My Spreadsheets
The Data Behind the Strategy
When I returned to stamp collecting, I did what any former CPA would do—I built spreadsheets. Lots of them. These are the tools I used to understand the scope of classic U.S. collecting, calculate realistic costs, and develop the foundation strategy described on this site.
I'm sharing them here in case they're useful to you.
Available Downloads
The $11 Million Calculation
Every major U.S. catalog number from the classic period, with values and variations. This is the spreadsheet that showed me collecting "everything" would cost over $11 million—and led me to the design-type approach.
Download master-stamp-lists.xlsx535 Design-Types Checklist
The complete list of unique stamp designs from 1847–1947. Use it as a collecting checklist or to understand what's included in the foundation collection.
Download design-num-to-scott-num-conversion.pdfFoundation Collection Cost Analysis
The breakdown behind the "under $10,000" estimate—showing how 95%+ of the stamps are inexpensive and where the real costs lie.
Download my-design-type-purchase-inventory.xlsxPhilatelic Rarities Listing
Siegel philatelic rarities listing—a reference for rare and significant U.S. stamp material.
Download seigel-philatelic-rarities.xlsxA Note on Using These
These spreadsheets reflect my research and analysis from 2015 onward. Catalog values change, market conditions shift, and your approach may differ from mine.
Use them as a starting point for your own thinking—not as gospel.
← Back to Where Do I Begin?
The Foundation Strategy that these spreadsheets support.