Categories and SKUs

Proper categorization and SKU management are essential for running an efficient dealership on CoinDuffle. Categories help buyers find your products, while SKUs help you track and manage your inventory internally.

Product Categories

Why Categories Matter

• Buyer discovery — Buyers browse categories to find products. A coin in the wrong category is a missed sale.
• Search relevance — CoinDuffle uses categories to improve search results and filtering
• Price pages — Products appear on the correct metal price pages based on their category and metal type
• Analytics — Category data helps you understand which product types perform best

Available Categories

CoinDuffle offers a structured category system designed for the precious metals and numismatic market:

US Coins

• American Eagles (Gold, Silver, Platinum, Palladium)
• Morgan Dollars
• Peace Dollars
• Walking Liberty Halves
• Mercury Dimes
• Buffalo Nickels
• Lincoln Cents
• Pre-1933 Gold
• Modern Commemoratives
• Proof Sets and Mint Sets

World Coins

• Canadian Maple Leafs
• South African Krugerrands
• Austrian Philharmonics
• British Britannias
• Australian Coins
• Chinese Pandas
• Mexican Libertads
• Other World Coins

Bullion Bars

• Gold Bars
• Silver Bars
• Platinum Bars
• Palladium Bars

Rounds

• Silver Rounds
• Gold Rounds
• Copper Rounds

Junk Silver

• 90% Silver (pre-1965 US)
• 40% Silver (1965–1970 Kennedy Halves)
• Canadian Silver
• World Silver

Certified / Graded

• PCGS Graded
• NGC Graded
• ANACS Graded
• ICG Graded

Collectibles

• Currency and Banknotes
• Tokens and Medals
• Coin Supplies and Accessories
• Books and References

Assigning Categories

During product creation or editing:

1. Find the Category dropdown in the product editor
2. Select the primary category that best describes your product
3. Save the product

Tips for accurate categorization:

• Choose the most specific category available — "Morgan Dollars" is better than just "US Coins" for a Morgan Dollar
• If a product could fit multiple categories, choose the one buyers are most likely to browse
• For certified coins, you can use the grading service category or the coin type category depending on which is more relevant

SKU Management

What Is a SKU?

A SKU (Stock Keeping Unit) is your internal product identifier. It's a code you assign to each product for your own inventory tracking. SKUs are visible only to you — buyers never see them.

Why Use SKUs?

• Inventory tracking — Quickly identify products in your physical inventory
• Order fulfillment — Find the right item fast when packing orders
• Reporting — Filter and analyze sales by SKU
• Cross-platform consistency — Use the same SKUs across CoinDuffle, your other selling channels, and your internal records
• CSV operations — SKUs are used as identifiers when importing or exporting product data

SKU Best Practices

Create a Consistent System

Develop a SKU format and stick with it. A good SKU system encodes useful information about the product.

Example format: [METAL]-[TYPE]-[YEAR]-[SEQUENCE]

Alternative format: [CATEGORY CODE]-[NUMBER]

SKU Rules

• Keep it short — 6–20 characters is ideal
• Use only letters, numbers, and hyphens — Avoid spaces, special characters, and symbols
• Make it unique — Every product in your store must have a different SKU
• Be descriptive — A good SKU tells you something about the product at a glance
• Never reuse — Once a SKU is used (even for a deleted product), don't assign it to a different product

Setting SKUs

Enter the SKU when creating or editing a product:

1. Find the SKU field in the product editor
2. Enter your SKU code
3. Save the product

If you don't enter a SKU, the system will not auto-generate one. We recommend always assigning a SKU for proper inventory management.

Organizing Your Catalog

For Small Inventories (under 50 products)

• Assign categories accurately
• Use simple sequential SKUs
• This level of inventory is easily managed manually

For Medium Inventories (50–500 products)

• Use a structured SKU system that encodes product attributes
• Review category assignments regularly to ensure accuracy
• Consider using a spreadsheet to track your SKU assignments
• Take advantage of bulk operations for efficient management

For Large Inventories (500+ products)

• Implement a formal SKU system with clear documentation
• Use CSV import/export for batch management
• Consider importing from your existing platform (Shopify/eBay) to maintain your established SKU system
• Regular inventory audits to ensure SKUs match physical inventory

Searching and Filtering Your Products

In the seller dashboard, you can search your product list by:

• Product title — Free text search
• SKU — Find a specific product instantly
• Category — Filter by category to see all products of a type
• Metal type — Filter by gold, silver, platinum, or palladium
• Status — Active, draft, out of stock, etc.

A well-organized catalog with consistent categories and SKUs makes managing hundreds of products straightforward.