hi,
If you have an eBay store and you want to sell on wordpress with WooCommerce, then we need to upload your products to WooCommerce. But there will be no sync with your eBay account and your website.
There are extensions which will sync your ebay store and your wordpress site, and you can install the same.
Do you already have a theme in mind or need to develop fresh.
If we can discuss further, I can know more and give you the best possible solution that will work,
best regards,