To sync inventory and price

1. Go to your Magento 2 admin panel.
2. Click on eBay present on the left navigation bar.
   
3. Click on Product Manager.
   The eBay Product Listing page appears as shown in the following figure:
   
4. Select the products for which you want to sync the price and inventory, by checking the corresponding boxes.
5. Click the Arrow button next to the Actions list, and then click Sync Inventory-Price.
   
6. A Confirmation dialog box appears as shown in the following figure. Click OK.
7. The page appears as shown in the following figure with the status:

The inventory and price of selected products get synced between Magento and eBay.