Hello Ali Ravani,

There is one app available on odoo store which are having very reach functionality to integrate your eBay seller accounts with odoo.

Here is some highlights of eBay Odoo Connector.

• Create a new listing

• Update existing listing

• Cancel listing

• Release listing

• Update price

• Update stock

• Import category & store category

• Import sales order (shipped / unshipped)

• Update tracking number

Please do visit eBay Odoo Connector for more details. eBay Helpdesk extension of eBay Odoo Connector is also available at odoo store.