There's no charge to use Seller Hub. You only pay for any subscriptions you may have, such as Stores, to access that functionality within Seller Hub.
All your listings - drafts, scheduled, active, unsold, ended – as well as your orders will appear in Seller Hub, so you can jump right in and continue business as usual.
Give Seller Hub a try and if you find it’s not for you, you can switch back to the basic My eBay Selling at any time.
Unlike the basic My eBay Selling, Seller Hub provides the ability to customize your Selling Overview and Active listings pages. You can also to take actions in bulk such as leaving feedback for multiple orders at one time.