The Inventory Sync feature in the Listing Tool helps you manage stock quantities across multiple eBay accounts from one centralized inventory system.

When inventory changes — whether from a manual edit, CSV upload, bulk action, or a received order — 3Dsellers can automatically sync the updated quantity to every connected channel where that SKU exists.

This helps prevent overselling and keeps inventory consistent across marketplaces.

To open Inventory Sync:

The Inventory Sync page displays all SKUs currently managed by the inventory system.

Each row in the table represents a synced SKU.

To begin tracking inventory for a product:

After selecting the SKU:

The SKU will immediately appear in the Inventory Sync table.

Once added, 3Dsellers can sync quantity updates across connected channels (depending on your sync settings).

To manually update a SKU:

From here you can:

The Inventory Log provides a full audit history, including:

Click Save & Exit when finished.

You can update multiple SKUs simultaneously using Bulk Actions.

Select one or more SKUs, then open the Bulk Actions menu.

The CSV import tool allows you to update many SKUs at once.

To access it:

The template uses the following columns:

Update SKU1 quantity to 5:

Use {DELETE} in the Quantity column:

This allows one SKU to maintain inventory across multiple warehouse locations.

Use Filter to quickly locate specific SKUs within your inventory.

Filters are organized into categories such as:

To apply a filter:

You can combine multiple filters to narrow down results even further.

Click Inventory Sync Settings by Channel to configure how inventory sync behaves for each connected eBay account.

This area controls:

This setting controls whether quantity changes made inside 3Dsellers are pushed to eBay.

Examples of inventory changes include:

Inventory changes remain inside 3Dsellers only.

3Dsellers automatically pushes quantity updates to your eBay listings.

When this setting is enabled for the first time, inventory will not sync immediately.

A new inventory action must occur first, such as:

After the next inventory event occurs, synchronization begins normally.

This setting controls whether incoming eBay orders reduce inventory inside 3Dsellers.

Orders do not affect inventory counts.

Each imported order automatically reduces the SKU quantity.

You sell the same SKU on:

Both listings use SKU:

Current inventory:

for both accounts in the channel settings.

When an order is received on eBay US:

This prevents overselling shared inventory.

You receive 50 additional units of:

Current stock:

3Dsellers immediately updates all synced eBay listings.

You receive a warehouse shipment affecting dozens of SKUs.

3Dsellers updates all matching SKUs and syncs the new quantities across connected channels.

You manage inventory manually for your eBay FR account and do not want automated quantity updates.

Exporting inventory is useful for:

If inventory looks incorrect, check the Inventory Log first.

It provides a complete history of:

making it the best place to troubleshoot unexpected stock changes.