Buyer guide
How to sync stock between Amazon and eBay
Selling the same item on both Amazon and eBay creates one obvious risk: a sale on one channel needs to reduce stock on the other before someone oversells it.
Why direct channel-to-channel sync falls short
Amazon and eBay do not share inventory with one another. Reliable sync therefore uses a third system as the source of truth: each marketplace reports sales into it, and it publishes the remaining sellable quantity back out.
How TrueSKU handles it
Each Amazon listing and each eBay listing gets linked to the same canonical SKU. A sale on either channel reduces that SKU's stock, and TrueSKU can then push the updated quantity back out to both - so the second channel reflects the sale rather than continuing to offer stock that's already gone.
Checks before switching it on
Map every sellable offer to the correct internal SKU, decide how bundles and multipacks consume components, account for stock reserved outside the two marketplaces, and review unmatched sales before allowing automated quantity updates.
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