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Cross-Marketplace Searching

Find arbitrage opportunities by comparing the same products across Amazon marketplaces

Find products listed at different prices across Amazon marketplaces. The agent matches products using their universal product identifiers, so you can spot pricing gaps between countries without manual research.

How It Works

Every physical product has a UPC or EAN code — a universal barcode that stays the same regardless of which Amazon marketplace it's listed on. When you ask the agent to check a product in another marketplace, it uses these codes to find the matching listing automatically.

You don't need to know the foreign ASIN or search for the product manually. Just ask, and the agent handles the cross-referencing.

Not every product has a UPC/EAN in Keepa's data, and not every product is listed in every marketplace. The agent will tell you which products it couldn't match.

Step-by-Step Workflow

Cross-marketplace searching works best as a targeted, curated process — not a bulk operation. Start with a shortlist of promising products, then surgically check pricing across marketplaces.

1. Build Your Shortlist

Start with a focused set of 10–50 ASINs. You can get these from:

  • A finder search with specific criteria (e.g., "Find Kitchen products under $30 with sales rank under 50,000 in the US")
  • An existing product list you've been tracking
  • Specific ASINs you've identified through your own research

2. Check Another Marketplace

Ask the agent to look up those products in a different marketplace:

  • "Check these products in the UK marketplace"
  • "Find the prices for my watchlist products in Germany"
  • "Look up these ASINs on amazon.co.jp"

The agent will match each product by its UPC/EAN and return the foreign listing with pricing data.

3. Compare and Filter

Ask the agent to highlight the best opportunities:

  • "Which of these have a price difference of more than 30%?"
  • "Rank these by price differential, highest first"
  • "Show me only the ones where the UK price is lower than the US price"

4. Save Your Finds

Save promising products to a new list for ongoing monitoring:

  • "Save the products with a 20%+ price gap to a list called UK Arbitrage Opportunities"
  • "Add the top 10 by price differential to my cross-marketplace list"

Example Queries

Here's what a typical cross-marketplace research session looks like:

Starting the search:

  • "Find Electronics products under $50 with sales rank under 100,000 in the US"
  • "Now check those products in the UK marketplace"

Analyzing results:

  • "Which products are at least 25% cheaper in the UK?"
  • "Show me the ones with the biggest price gap"
  • "Are any of these products ranked better in the UK than the US?"

Saving and tracking:

  • "Save the top 15 by price differential to a list called UK-US Electronics"
  • "Refresh my UK-US Electronics list" (to check for price changes later)

Tips

Start Small

Begin with 10–20 products to validate your approach before scaling up. Cross-marketplace lookups consume tokens for each product in each marketplace, so a focused list keeps costs manageable.

Choose Marketplace Pairs Wisely

Some marketplace pairs tend to have more pricing discrepancies than others. Common pairs to explore:

  • US ↔ UK — Large markets with frequent price differences
  • US ↔ Canada — Geographic proximity, different pricing
  • US ↔ Germany — Europe's largest Amazon marketplace
  • UK ↔ Germany — Intra-European opportunities

Be Aware of Currency

The agent returns prices in each marketplace's local currency. When comparing prices across marketplaces, keep in mind:

  • Currency conversion rates fluctuate daily
  • The agent uses approximate exchange rates for comparison
  • Always verify current exchange rates before making sourcing decisions

Ask the agent to show price differentials as percentages rather than absolute amounts. Percentages account for currency differences and give you a clearer picture of the opportunity.

Combine with Other Filters

Cross-marketplace searching is most powerful when combined with other product criteria:

  • "Check my UK list, but only show products where Amazon has the buy box less than 50% of the time in both marketplaces"
  • "Which of these cross-marketplace opportunities also have a sales rank under 50,000?"

Processing Time

Cross-marketplace lookups involve multiple steps — the agent needs to look up each product's UPC/EAN, search for it in the target marketplace, and then fetch pricing data. This means it takes longer than a standard product lookup.

For a list of 20 products, expect the agent to work through them over several messages. For larger lists (50+), the agent will process products in batches as a background job, so you can continue chatting while it works.

The processing time depends on your Keepa token refill rate and how many products need to be matched. Keep your initial list small (10–20 products) for faster turnaround, then scale up once you've validated the approach.

Limitations

Keep these constraints in mind when doing cross-marketplace research:

  • Currency estimates are approximate — Exchange rates used for comparison may not reflect the exact rate you'd get when converting funds. Always verify with your bank or payment provider.
  • Not all products exist everywhere — A product sold on amazon.com may not be listed on amazon.co.uk. The agent will report which products couldn't be matched.
  • Pricing data may be hours old — Keepa tracks prices periodically, not in real-time. Always confirm prices on Amazon before making purchasing decisions.
  • FBA fees vary by marketplace — A lower sticker price doesn't guarantee profit. Factor in marketplace-specific FBA fees, shipping costs, and import duties.
  • UPC/EAN coverage varies — Some products, especially Amazon private-label items, may not have universal product codes in Keepa's database.