For sellers · Helena, Montana
We buy & appraise stamp collections.
Did you inherit a stamp collection — or come across one at an estate sale that looked too old to pass on? Something gifted? Big Sky Stamps, in Helena, Montana, will appraise it and give you a free, no-obligation valuation — done personally by a licensed CPA and philatelist. If your collection has value and you prefer to sell, let us know, so we can provide a cash offer as well.
Start here — see what you have, free.
Most collections are worth checking before you photograph and ship anything. Snap your stamps with our free app, MySky Stamps— you’ll get an instant identification and value estimate in seconds, right on your phone.
Prefer to read? Self-check guide · Seller FAQ
Do you have a large, inherited collection — or something you know was nurtured and prized by its previous owner? Please feel free to reach out directly to our specialist, jason@bigskystamps.com, for a prompt reply, and he’ll guide you from there.
What we consider
We specialize in classic stamps (pre-1930). Single-country collections, US, worldwide accumulations, postal history, covers and first-day covers, used or mint. Album, binder, glassine, or shoebox. The one thing we ask is that the material arrive in decent shape: dry, intact, free of mold or significant water damage. Mounted or loose is fine; tidy or untidy is fine. We’ll do the sorting.
How it works
- 1Check it yourself, free. Use the free MySky Stamps app to identify and value your stamps in seconds — or read our self-check guide. It helps you decide whether the collection is likely to be a good fit before you spend time photographing it.
- 2Send us your best pieces. Found something promising? Use our inquiry form to share photos of the collection — and your oldest or best pieces — plus a few details about its size and history.
- 3We respond, and make a firm offer. We reply within a few business days with questions, a preliminary valuation range, or shipping instructions. Once a collection arrives, we work through it carefully and email you a written offer. If you accept, payment goes out within a few days. Free, no obligation.
Why us
Big Sky Stamps is a boutique operation in Helena, Montana — we deal in high-quality, valuable material at low volume. Your collection is appraised personally by a CPA and philatelist, so you get financial rigor and real stamp expertise in the same person — especially reassuring when you’re settling an estate or sorting out an inheritance. Individualized, honest, personal service is what you can expect from Big Sky. Montana Values mixed with big city expertise.
Ready to send us a collection?
If you haven’t already, check your stamps with our free app or our self-check guide first — it’ll help you decide whether your collection is likely to be a good fit. If so, feel free to start an inquiry.
Do you have a large, inherited collection — or something you know was nurtured and prized by its previous owner? Please feel free to reach out directly to our specialist, jason@bigskystamps.com, for a prompt reply, and he’ll guide you from there.