Marketplace sellers ship constantly, and most default to printed labels for everything. That is right for parcels and wrong for a surprising share of what a small shop actually sends.
Knowing which is which saves money and, more importantly, saves time at the counter.
Where stamps win
Flat, light, non-tracked items. Stickers, patterns, prints, jewelry in a padded flat, greeting cards, small paper goods. If it fits the letter or large-envelope dimensions and the buyer does not need tracking, stamps are cheaper and involve no printer, no label stock and no queue.
Anything you hand to a carrier. A stamped envelope goes in the outgoing mail. A labeled parcel often means a trip or a scheduled pickup.
Personal touches. A handmade item arriving with a real commemorative stamp on the envelope reads completely differently from a franked label. For a shop selling craft, that is part of the product.
Where labels win
Anything that needs tracking. Marketplace seller protection generally depends on delivery scans. If a dispute would cost you the item's value, buy the tracking.
Parcels. Once you are into package rates, printed postage priced by zone and weight is almost always cheaper than assembling the equivalent in stamps.
High volume of identical items. Label workflows scale better once you are past a certain daily count.
Best deals on Forever stamps
The mistake that gets small sellers in trouble
Underpaying on flats. A padded envelope with a rigid item inside stops being a "flat" and becomes a parcel, priced accordingly. A slightly-too-thick mailer, a stiffener board, an item that makes the envelope uneven — each pushes the piece into a higher category.
Short-paid mail comes back to you, which on a marketplace means a late shipment, a message from the buyer, and potentially a metric that affects your standing. Weigh and check the thickness of one representative package before committing to a postage figure for the run.
Buying postage in quantity
If stamps are a meaningful part of your shipping, buy them the way you buy any other supply.
Forever stamps hold their value against rate increases, so buying ahead of an announced adjustment locks in the lower cost. Rate changes are published in advance by the Postal Regulatory Commission, and current figures live in the USPS Notice 123 charts.
Stock what your mail actually needs: standard Forever for letters, additional-ounce stamps for anything heavier, and non-machineable surcharge stamps for square or rigid mailers.
The 40% problem
Marketplace sellers are targeted specifically for counterfeit postage, because the buyer profile is perfect: cost-sensitive, high volume, buying online already.
If postage is offered at 40% below retail, it is not a wholesale relationship. Genuine stamps carry phosphor tagging that sorting equipment verifies on every piece, and untagged stock is pulled rather than delayed. For a marketplace seller that means orders marked shipped that never move — which damages metrics far more than the postage ever saved.
Legitimate secondary-market sourcing supports roughly 10–20% off. That is the whole range.
| Metric | Verified specialist | Marketplace "liquidator" |
|---|---|---|
| UV response | Correct phosphor spectrum | Weak / flat inert |
| Audit trail | US tax invoice and receipt | None / personal payment app |
| Delivery outcome | Accepted normally | High risk of seizure |
Where to buy
Full price from the USPS official store, or bulk at a real discount from a specialist such as Forever Stamp Center. For an urgent local drop, the USPS location finder.
If the history interests you, the Smithsonian National Postal Museum and USPS postal history archives are worth a browse.
The short version
Stamps for flat, light, untracked items. Labels for parcels and anything needing a delivery scan. Weigh before you commit, buy ahead of rate rises, and treat a 40% discount as information about the seller rather than an opportunity.
More on buying Forever stamps
- 👉 USPS Stamps Price List 2026: Avoiding Surcharges on Bulk Business Mail
- 👉 Why Accounting Departments Prefer Pre-stamped Envelopes vs Bulk Stamps
- 👉 USPS News on Stamp Price Changes: Preparing for the July 2026 Hike
USPS professional based in New York with over 12 years of experience in postal operations. She writes about Forever Stamps, offering practical guidance on safe purchasing and mailing practices while closely following USPS policy updates.
