If you are unable to understand why a product does not sync with eBay, use the following tips based on common errors to easily track the root cause :

–  Product default category is not configured in the module
In this case, the product will not be seen to sync in any section of the module.
It is therefore necessary to modify the default category of the product or link the default category with a valid eBay category in second module tab (product categories mapping)

–  Product default category is not flagged as active in “standard sync” TAB
In this case, it is necessary to activate the flag in the category to let the product synchronize manually (via standard or fast sync) or automatically (via cron or product save).

– Products are properly enabled for sync, but they do not update on eBay during a backoffice SAVE.
Verify that you have not enabled “Disable sync on save” in the general module configuration tab.

– Products are correctly enabled for synchronization, but during SAVE or a standard / fast sync I get an error message.
In this case, module is trying to send the product on eBay, but the marketplace is returning with an error. You can check out the most common errors by visiting the “Ebay errors” FAQ