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Duplicate Control

Find duplicate card listings and combine them into one

Duplicate Control scans your inventory for cards listed more than once, shows why each pair matches, and combines the copies into a single eBay listing with the quantity added up — only after you've previewed and confirmed every change.

Start Free Open Duplicate Control

No credit card required · 500 scans / month on the free plan

Duplicate Control
SlabIQ Duplicate Control: two eBay listings of the same Umbreon EX card grouped as a duplicate, with the evidence for the match and which listing would be kept
Each duplicate group shows why the listings match and exactly what combining would do on eBay, before anything changes.

Why it matters

Duplicate listings split your sales and your stock

Over time the same card ends up listed twice: two copies scanned in different batches, an old listing nobody ended, an import that brought one back. Each duplicate splits the card's watchers and sales history and makes stock harder to trust.

Duplicate Control finds those copies, explains why it thinks they match, and folds them into one listing with the right quantity.

How it works

How Duplicate Control works

  1. Step 1

    Run a scan

    Scan unsold inventory at strict, balanced or loose sensitivity, optionally filtered by category or marketplace.

  2. Step 2

    Review the matches

    Each group shows its evidence — identical titles, the same catalog card, the same card number, SKU or eBay item — and a confidence level.

  3. Step 3

    Choose what to keep

    Keep the suggested listing or pick another, dismiss pairs that aren't duplicates, and stage the groups you want to combine.

  4. Step 4

    Preview and confirm

    The preview lists exactly which eBay listings would end. Nothing runs until you tick the confirmation and start it.

  5. Step 5

    Combine

    The kept listing's quantity is raised on eBay first, then the other listings are ended, and every step is recorded.

Capabilities

What you can do with Duplicate Control

  • Evidence on every match

    See why two listings were grouped, from identical titles and catalog matches to shared SKUs or eBay item numbers.

  • Confidence tiers

    Exact, very likely, likely and possible matches, with only well-proven groups marked ready.

  • Safe by design

    Graded and raw copies, different grades or graders, different serial numbers and different eBay stores are never combined.

  • eBay quantity checked first

    The kept listing's quantity starts from eBay's live figure, and if a step fails the combine is reversed.

  • SKU Vault

    Every retired SKU records where its stock went, so old SKUs stay traceable.

  • Activity trail

    Completed runs, items needing attention and a full audit trail of what was changed.

  • Duplicates inside a batch

    In the Batch Scanner, Check Batch Duplicates combines copies of the same card before they're ever listed, and that can be undone.

Screens from SlabIQ with a sample account: real catalog cards; prices, costs and sales are examples.

Good to know

What to expect

  • Combining works on eBay listings.
  • Ending a listing can't be undone from SlabIQ, which is why every combine needs a preview and your confirmation.
  • Nothing combines automatically; every group is staged and confirmed by you.
  • Duplicate Control is available on plans that include it; see the pricing page.

Use cases

Who uses Duplicate Control

  • Long-time eBay sellers

    Clean up years of accidental double listings into single listings with the right quantity.

  • Sellers who import

    After importing an existing eBay store, find the copies that were listed separately.

  • High-volume scanners

    Catch the same card scanned in two batches before buyers see it listed twice.

Questions

Duplicate Control: common questions

How does SlabIQ find duplicate listings?

A scan compares your unsold inventory using identical and similar titles, the same catalog card, the same card number, SKU or eBay item number, and gives each group a confidence level with the evidence behind it.

Will it combine listings automatically?

No. You review each group, stage the ones you want, and confirm on a preview that lists every eBay listing that would end.

What happens on eBay when I combine?

The listing you keep has its quantity raised to cover the copies, then the other listings are ended. If a step fails, the combine is reversed.

Can it combine a graded card with a raw one?

No. Graded and raw copies, different grades or graders, different serial numbers and listings in different eBay stores are never combined.

Keep exploring

Related features and tools

See every SlabIQ feature

Try Duplicate Control on your own cards

Create a free SlabIQ account and see it work with your own inventory. No credit card required.

Start Free Open Duplicate Control

500 scans / month on the free plan