Software for resellers and collectible stores to sell used stamps at scale

Professional collectible resellers use TWICE to run high-volume operations for stamps, coins, and other collectible items — from intake and authentication to listing and sale.

Process supply faster

Intake single stamps, sets, collections, and estates with consistent, fast, unified workflows.

Grade items accurately

Capture condition, catalog numbers, provenance, and varieties using philately-specific attributes and high-resolution media.

List items at scale

Turn structured intake data into clear, trustworthy listings — no retyping, no duplicated work.

Sell everywhere

Cross-list to your own store, marketplaces, shows, and retail locations with real-time sync and integrated payments.

From sourcing to selling in one continuous flow

Sourcing

Register resale inventory with structure

Whether you buy estates, collections, dealer inventories, or take consignments, TWICE keeps stamp intake structured from day one. Each stamp or lot gets a unique identity with standardized data fields, so you can process high volumes without losing track of details or value.
Unique IDs
Assign a serialized ID to every stamp, set, or lot the moment it enters your inventory.
Register new items quickly
Quickly add new entries and fill in all the necessary product data consistently. You can also bulk create items by uploading a CSV.
Intake templates
Create reusable templates to streamline item intake and registration for stamps, tailored to your workflows.
Flexible intake models
TWICE supports intake across sourcing models, from individual purchases to consignment, trade-ins, and bulk acquisition.
Inspecting & grading

Inspect and grade consistently

Define inspection criteria for stamps and collections, document condition and required records per unit, and assign review steps across your team for consistent grading.
Dynamic attributes
Log grade, centering, gum status, hinges, faults, and cancellations with custom philatelic fields.
Item-level media
Add photos and documents to each item to support inspection, grading, and trust.
Attribute presets
Create reusable attribute presets that standardize grading and reduce manual work.
Task management
Route inspection and grading tasks through clear, repeatable workflows across your team.
Listing

List fast

Create listings in seconds using structured data, flexible variants, and attribute-based pricing rules.
Listing templates
Convert structured product data into customer-ready listings across channels with minimal effort.
Tags & collections
Use tags and collections to organize listings, promote your offerings, and power rule-based campaigns and more.
Variants
Use variants to group similar items under one listing and let shoppers choose the option that fits them best.
Conditional pricing
Set prices dynamically using rules tied to condition, grade, or other product attributes.
Selling

Sell across every channel

Whether you sell online, in-store, at shows, or via marketplaces and auctions, TWICE keeps every channel synced. Cross-list high-demand stamps confidently, avoid double-selling unique pieces, and manage all orders through a single backend built for one-of-a-kind inventory.
Cross-listing
Publish items to multiple channels in a few clicks — your own shop, marketplaces, or private offers.
Built-in online store
Run a branded storefront optimized for collectible, one-of-a-kind stock with secure checkout.
Integrated payments
Offer flexible payment options for high-value items while keeping fees below typical marketplace commissions.
Unified order management
See all orders, holds, and reservations from every channel in one organized dashboard.

Selling old stamps is good business. Doing it with TWICE is even better.

From solo philatelic dealers to established auction houses, TWICE supports any team selling used and collectible stamps at volume with tools tailored to complex, one-of-a-kind inventory.

Independent resellers

Replace spreadsheets and scattered tools with one easy-to-use system that helps you organize stamp collection inventory and cross-list items quickly across the collectible resale channels that matter.

Specialty stores

Streamline intake, pricing, and listing work while expanding from a physical store to online channels, and stand out by offering a more transparent and reliable buying experience.

Auction houses & specialty resellers

Centralize cataloging, documentation, and sales data for unique lots, and reuse structured information across auctions, fixed-price listings, and private sales to increase sell-through.

Reselling stamps, simplified

Remove the most common resale bottlenecks and run your operations smoothly, whether you are just getting started or scaling a complex resale business.

Frequently asked questions

How does TWICE handle one-of-a-kind and high-value stamps?

TWICE uses single-item tracking so each stamp, set, or lot has its own record with condition, catalog references, images, provenance, purchase source, and pricing history. You can mark high-value items, require additional review before publishing, and keep a full audit trail of changes and sales — ideal for rare or certificate-backed pieces.

Can I track catalog numbers and philatelic attributes in TWICE?

Yes. TWICE lets you create and standardize custom fields for catalog references (e.g., Scott, Michel, Stanley Gibbons, Yvert), country, issue, face value, watermark, perforations, format, and more. These attributes can power filtering, pricing rules, and listing templates, ensuring consistent descriptions across your inventory.

Does TWICE support consignment and estate purchases for stamps?

TWICE is built to handle multiple intake models. You can record consignor agreements, commission structures, and automated payout calculations, alongside outright purchases of estates or dealer inventories. Both models run in the same system, so you always know which items are owned, which are consigned, and how they perform.

How does TWICE help with accurate grading and buyer trust?

You can codify your grading standards into repeatable workflows: required condition fields, mandatory images, and checklists for faults and authenticity. Detailed records, high-resolution scans, and attached certificates help you present transparent listings, reduce disputes, and maintain a consistent reputation with serious collectors.

Can TWICE connect my philatelic shop, online store, and marketplaces?

Yes. TWICE centralizes inventory across your physical shop, shows, warehouse, and online channels. When an item sells or is reserved in one channel, its availability updates everywhere in real time, reducing the risk of double-selling unique stamps and keeping your team aligned on what’s available.