Q: How to relist eBay products with WooHosted?
A: Inside of WooHosted, if you go to eBay Sync --> Listings, you can select items and use the bulk actions drop-down to relist them. That would update the identical "product" in woocommerce with the correct sku number (eBay item id).
But you'd still have to go in and correct each of the old sku grid entries to provide the new eBay item numbers.